diff --git a/src/builtins/status.cpp b/src/builtins/status.cpp
index d63b0534e..d6d390f69 100644
--- a/src/builtins/status.cpp
+++ b/src/builtins/status.cpp
@@ -100,7 +100,6 @@ namespace {
 struct status_cmd_opts_t {
     int level{1};
     maybe_t<job_control_t> new_job_control_mode{};
-    const wchar_t *feature_name{};
     status_cmd_t status_cmd{STATUS_UNDEF};
     bool print_help{false};
 };
diff --git a/src/complete.cpp b/src/complete.cpp
index 5ee3ce877..074523713 100644
--- a/src/complete.cpp
+++ b/src/complete.cpp
@@ -241,10 +241,6 @@ __attribute__((always_inline)) static inline bool natural_compare_completions(
     return wcsfilecmp(a.completion.c_str(), b.completion.c_str()) < 0;
 }
 
-bool completion_t::is_naturally_less_than(const completion_t &a, const completion_t &b) {
-    return natural_compare_completions(a, b);
-}
-
 void completion_t::prepend_token_prefix(const wcstring &prefix) {
     if (this->flags & COMPLETE_REPLACES_TOKEN) {
         this->completion.insert(0, prefix);
@@ -882,7 +878,7 @@ static void complete_load(const wcstring &name) {
 bool completer_t::complete_param_for_command(const wcstring &cmd_orig, const wcstring &popt,
                                              const wcstring &str, bool use_switches,
                                              bool *out_do_file) {
-    bool use_common = true, use_files = true, has_force = false;
+    bool use_files = true, has_force = false;
 
     wcstring cmd, path;
     parse_cmd_string(cmd_orig, &path, &cmd, ctx.vars);
@@ -926,8 +922,7 @@ bool completer_t::complete_param_for_command(const wcstring &cmd_orig, const wcs
     // the lock because callouts (like the condition) may add or remove completions. See issue 2.
     for (const option_list_t &options : all_options) {
         size_t short_opt_pos = short_option_pos(str, options);
-        bool last_option_requires_param = false;
-        use_common = true;
+        bool last_option_requires_param = false, use_common = true;
         if (use_switches) {
             if (str[0] == L'-') {
                 // Check if we are entering a combined option and argument (like --color=auto or
diff --git a/src/complete.h b/src/complete.h
index abd27035a..216f6a9db 100644
--- a/src/complete.h
+++ b/src/complete.h
@@ -87,13 +87,6 @@ class completion_t {
     completion_t(completion_t &&) noexcept;
     completion_t &operator=(completion_t &&) noexcept;
 
-    // Compare two completions. No operating overlaoding to make this always explicit (there's
-    // potentially multiple ways to compare completions).
-    //
-    // "Naturally less than" means in a natural ordering, where digits are treated as numbers. For
-    // example, foo10 is naturally greater than foo2 (but alphabetically less than it).
-    static bool is_naturally_less_than(const completion_t &a, const completion_t &b);
-
     /// \return the completion's match rank. Lower ranks are better completions.
     uint32_t rank() const { return match.rank(); }
 
diff --git a/src/fish_tests.cpp b/src/fish_tests.cpp
index bd6d8646b..dcc2e3790 100644
--- a/src/fish_tests.cpp
+++ b/src/fish_tests.cpp
@@ -2874,8 +2874,6 @@ static void test_test_brackets() {
     null_output_stream_t null{};
     io_streams_t streams(null, null);
 
-    wcstring_list_t args;
-
     const wchar_t *args1[] = {L"[", L"foo", nullptr};
     do_test(builtin_test(parser, streams, args1) != 0);
 
diff --git a/src/parser.cpp b/src/parser.cpp
index 3ea82ccc3..2ffd6229c 100644
--- a/src/parser.cpp
+++ b/src/parser.cpp
@@ -114,10 +114,6 @@ int parser_t::set_var_and_fire(const wcstring &key, env_mode_flags_t mode, wcstr
     return set_var_and_fire(key, mode, std::move(vals));
 }
 
-int parser_t::set_empty_var_and_fire(const wcstring &key, env_mode_flags_t mode) {
-    return set_var_and_fire(key, mode, wcstring_list_t{});
-}
-
 block_t *parser_t::push_block(block_t &&block) {
     block.src_lineno = parser_t::get_lineno();
     block.src_filename = parser_t::current_filename();
@@ -140,39 +136,6 @@ void parser_t::pop_block(const block_t *expected) {
     if (pop_env) vars().pop();
 }
 
-const wchar_t *parser_t::get_block_desc(block_type_t block) {
-    switch (block) {
-        case block_type_t::while_block:
-            return WHILE_BLOCK;
-        case block_type_t::for_block:
-            return FOR_BLOCK;
-        case block_type_t::if_block:
-            return IF_BLOCK;
-        case block_type_t::function_call:
-            return FUNCTION_CALL_BLOCK;
-
-        case block_type_t::function_call_no_shadow:
-            return FUNCTION_CALL_NO_SHADOW_BLOCK;
-        case block_type_t::switch_block:
-            return SWITCH_BLOCK;
-        case block_type_t::subst:
-            return SUBST_BLOCK;
-        case block_type_t::top:
-            return TOP_BLOCK;
-        case block_type_t::begin:
-            return BEGIN_BLOCK;
-        case block_type_t::source:
-            return SOURCE_BLOCK;
-        case block_type_t::event:
-            return EVENT_BLOCK;
-        case block_type_t::breakpoint:
-            return BREAKPOINT_BLOCK;
-        case block_type_t::variable_assignment:
-            return VARIABLE_ASSIGNMENT_BLOCK;
-    }
-    return _(UNKNOWN_BLOCK);
-}
-
 const block_t *parser_t::block_at_index(size_t idx) const {
     return idx < block_list.size() ? &block_list[idx] : nullptr;
 }
diff --git a/src/parser.h b/src/parser.h
index 10ef58418..85ee14c68 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -380,7 +380,6 @@ class parser_t : public std::enable_shared_from_this<parser_t> {
     /// \return a value like ENV_OK.
     int set_var_and_fire(const wcstring &key, env_mode_flags_t mode, wcstring val);
     int set_var_and_fire(const wcstring &key, env_mode_flags_t mode, wcstring_list_t vals);
-    int set_empty_var_and_fire(const wcstring &key, env_mode_flags_t mode);
 
     /// Pushes a new block. Returns a pointer to the block, stored in the parser. The pointer is
     /// valid until the call to pop_block().
@@ -389,9 +388,6 @@ class parser_t : public std::enable_shared_from_this<parser_t> {
     /// Remove the outermost block, asserting it's the given one.
     void pop_block(const block_t *expected);
 
-    /// Return a description of the given blocktype.
-    static const wchar_t *get_block_desc(block_type_t block);
-
     /// Return the function name for the specified stack frame. Default is one (current frame).
     maybe_t<wcstring> get_function_name(int level = 1);
 
diff --git a/src/parser_keywords.cpp b/src/parser_keywords.cpp
index a26d217ce..d3e3f6a93 100644
--- a/src/parser_keywords.cpp
+++ b/src/parser_keywords.cpp
@@ -40,10 +40,6 @@ static size_t list_max_length(const string_set_t &list) {
     return result;
 }
 
-bool parser_keywords_skip_arguments(const wcstring &cmd) {
-    return cmd == skip_keywords[0] || cmd == skip_keywords[1];
-}
-
 bool parser_keywords_is_subcommand(const wcstring &cmd) {
     const static string_set_t search_list = ([] {
         string_set_t results;
@@ -59,14 +55,6 @@ bool parser_keywords_is_subcommand(const wcstring &cmd) {
     return cmd.length() <= max_len && search_list.find(cmd) != not_found;
 }
 
-bool parser_keywords_is_block(const wcstring &word) {
-    const static auto max_len = list_max_length(block_keywords);
-    const static auto not_found = block_keywords.end();
-
-    // Everything above is executed only at startup, this is the actual optimized search routine:
-    return word.length() <= max_len && block_keywords.find(word) != not_found;
-}
-
 bool parser_keywords_is_reserved(const wcstring &word) {
     const static string_set_t search_list = ([] {
         string_set_t results;
diff --git a/src/parser_keywords.h b/src/parser_keywords.h
index cab823e58..c274645af 100644
--- a/src/parser_keywords.h
+++ b/src/parser_keywords.h
@@ -20,11 +20,4 @@ bool parser_keywords_is_subcommand(const wcstring &cmd);
 /// \return 1 of the command parameter is a command, 0 otherwise
 bool parser_keywords_is_reserved(const wcstring &word);
 
-/// Test if the specified string is command that opens a new block.
-bool parser_keywords_is_block(const wcstring &word);
-
-/// Check if the specified command is one of the builtins that cannot have arguments, any followin
-/// argument is interpreted as a new command.
-bool parser_keywords_skip_arguments(const wcstring &cmd);
-
 #endif
diff --git a/src/proc.cpp b/src/proc.cpp
index 296c76e4e..575a6634e 100644
--- a/src/proc.cpp
+++ b/src/proc.cpp
@@ -310,13 +310,6 @@ void job_t::mark_constructed() {
     mut_flags().constructed = true;
 }
 
-bool job_t::has_internal_proc() const {
-    for (const auto &p : processes) {
-        if (p->is_internal()) return true;
-    }
-    return false;
-}
-
 bool job_t::has_external_proc() const {
     for (const auto &p : processes) {
         if (!p->is_internal()) return true;
diff --git a/src/proc.h b/src/proc.h
index 9047ff1fa..5bc48289c 100644
--- a/src/proc.h
+++ b/src/proc.h
@@ -462,7 +462,6 @@ class job_t : noncopyable_t {
     /// \return whether we have internal or external procs, respectively.
     /// Internal procs are builtins, blocks, and functions.
     /// External procs include exec and external.
-    bool has_internal_proc() const;
     bool has_external_proc() const;
 
     /// \return whether this job, when run, will want a job ID.
diff --git a/src/wcstringutil.cpp b/src/wcstringutil.cpp
index 9f2e2dadf..2bdba17f8 100644
--- a/src/wcstringutil.cpp
+++ b/src/wcstringutil.cpp
@@ -315,15 +315,3 @@ int fish_wcwidth_visible(wchar_t widechar) {
     if (widechar == L'\b') return -1;
     return std::max(0, fish_wcwidth(widechar));
 }
-
-int fish_wcswidth_visible(const wcstring &str) {
-    int res = 0;
-    for (wchar_t ch : str) {
-        if (ch == L'\b') {
-            res += -1;
-        } else {
-            res += std::max(0, fish_wcwidth(ch));
-        }
-    }
-    return res;
-}
diff --git a/src/wcstringutil.h b/src/wcstringutil.h
index d8e1ae708..0a88cd2a3 100644
--- a/src/wcstringutil.h
+++ b/src/wcstringutil.h
@@ -297,10 +297,4 @@ class line_iterator_t {
 /// Like fish_wcwidth, but returns 0 for characters with no real width instead of -1.
 int fish_wcwidth_visible(wchar_t widechar);
 
-/// The same, but for all chars. Note that this only makes sense if the string has an arbitrary long
-/// prefix - backslashes can move the cursor *before* the string.
-///
-/// In typical usage, you probably want to wrap wcwidth_visible to accumulate the width, but never
-/// go below 0.
-int fish_wcswidth_visible(const wcstring &str);
 #endif