DEV: removes github page documentation page generation (#20268)

It was causing errors on C, will need to investigate a better solution in the future.

.github/workflows/documentation.yml

@@ -1,81 +0,0 @@
-name: Documentation
-
-on:
-  pull_request:
-  push:
-    branches:
-      - main
-
-permissions:
-  contents: write
-
-jobs:
-  build:
-    if: "!(github.event_name == 'push' && github.repository == 'discourse/discourse-private-mirror')"
-    name: run
-    runs-on: ubuntu-latest
-    container: discourse/discourse_test:slim
-    timeout-minutes: 30
-
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          fetch-depth: 1
-
-      - name: Setup Git
-        run: |
-          git config --global user.email "ci@ci.invalid"
-          git config --global user.name "Discourse CI"
-
-      - name: Bundler cache
-        uses: actions/cache@v3
-        with:
-          path: vendor/bundle
-          key: ${{ runner.os }}-gem-${{ hashFiles('**/Gemfile.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-gem-
-
-      - name: Setup gems
-        run: |
-          gem install bundler --conservative -v $(awk '/BUNDLED WITH/ { getline; gsub(/ /,""); print $0 }' Gemfile.lock)
-          bundle config --local path vendor/bundle
-          bundle config --local deployment true
-          bundle install --jobs 4
-          bundle clean
-
-      - name: Get yarn cache directory
-        id: yarn-cache-dir
-        run: echo "dir=$(yarn cache dir)" >> $GITHUB_OUTPUT
-
-      - name: Yarn cache
-        uses: actions/cache@v3
-        id: yarn-cache
-        with:
-          path: ${{ steps.yarn-cache-dir.outputs.dir }}
-          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-yarn-
-
-      - name: Yarn install
-        run: yarn install
-
-      - name: Check documentation
-        run: |
-          LOAD_PLUGINS=1 bin/rake documentation
-
-          if [ ! -z "$(git status --porcelain documentation/)" ]; then
-            echo "Documentation is not up to date. To resolve, run:"
-            echo "  LOAD_PLUGINS=1 bin/rake documentation"
-            echo
-            echo "Or manually apply the diff printed below:"
-            echo "---------------------------------------------"
-            git -c color.ui=always diff documentation/
-            exit 1
-          fi
-        timeout-minutes: 30
-
-      - name: Deploy documentation to github pages
-        uses: peaceiris/actions-gh-pages@v3
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./documentation