diff --git a/share/functions/hostname.fish b/share/functions/hostname.fish
deleted file mode 100644
index e45d984de..000000000
--- a/share/functions/hostname.fish
+++ /dev/null
@@ -1,10 +0,0 @@
-# Query for USERDOMAIN to shorten waiting times when OS isn't Windows.
-set -q USERDOMAIN
-and switch (uname)
-    case 'CYGWIN_*'
-        # Cygwin's hostname is broken when computer name contains Unicode
-        # characters. This hack "fixes" hostname in Cygwin.
-        function hostname --description "Show or set the system's host name"
-            echo $USERDOMAIN
-        end
-end