CI: Remove run-cmake-format action

cmake-format was replaced with gersemi in
19d3e30a3a and this action is now unused
(and wouldn't work anymore anyways due to the removal of the
./build-aux/run-cmake-format script).

This commit includes build-aux README fix-ups where the now nonexistent
run-cmake-format script was mentioned and the run-gersemi script was
misspelled.

.github/actions/run-cmake-format/action.yaml

@@ -1,59 +0,0 @@
-name: Run cmake-format
-description: Runs cmake-format and checks for any changes introduced by it
-inputs:
-  failCondition:
-    description: Controls whether failed checks also fail the workflow run
-    required: false
-    default: never
-  workingDirectory:
-    description: Working directory for checks
-    required: false
-    default: ${{ github.workspace }}
-runs:
-  using: composite
-  steps:
-    - name: Check Runner Operating System 🏃‍♂️
-      if: runner.os == 'Windows'
-      shell: bash
-      run: |
-        : Check Runner Operating System 🏃‍♂️
-        echo "::notice::run-cmake-format action requires a macOS-based or Linux-based runner."
-        exit 2
-
-    - name: Check for Changed Files ✅
-      uses: ./.github/actions/check-changes
-      id: checks
-      with:
-        checkGlob: "'*.cmake' '*CMakeLists.txt'"
-        diffFilter: 'ACM'
-
-    - name: Install Dependencies 🛍️
-      if: runner.os == 'Linux' && fromJSON(steps.checks.outputs.hasChangedFiles)
-      shell: bash
-      run: |
-        : Install Dependencies 🛍️
-        echo ::group::Install Dependencies
-        eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
-        echo "/home/linuxbrew/.linuxbrew/bin:/home/linuxbrew/.linuxbrew/sbin" >> $GITHUB_PATH
-        brew install --quiet zsh
-        echo ::endgroup::
-
-    - name: Run cmake-format 🎛️
-      if: fromJSON(steps.checks.outputs.hasChangedFiles)
-      id: result
-      shell: zsh --no-rcs --errexit --pipefail {0}
-      working-directory: ${{ github.workspace }}
-      env:
-        CHANGED_FILES: ${{ steps.checks.outputs.changedFiles }}
-      run: |
-        : Run cmake-format 🎛️
-        if (( ${+RUNNER_DEBUG} )) setopt XTRACE
-
-        print ::group::Install cmakelang
-        pip3 install cmakelang
-        print ::endgroup::
-
-        print ::group::Run cmake-format
-        local -a changes=(${(s:,:)CHANGED_FILES//[\[\]\'\"]/})
-        ./build-aux/run-cmake-format --fail-${{ inputs.failCondition }} --check ${changes}
-        print ::endgroup::

build-aux/README.md

@@ -3,7 +3,7 @@
 This folder contains:
 - Various formatting scripts:
   - `run-clang-format` which formats C/C++/ObjC/ObjC++ files
-  - `run-cmake-format` which formats CMake files
+  - `run-gersemi` which formats CMake files
   - `run-swift-format` which formats Swift files
   - `format-manifest.py` which formats Flatpak manifest JSON files
 - The Flatpak manifest used to build OBS Studio
@@ -23,7 +23,7 @@ Example of use:
 ./build-aux/run-clang-format
 ```
 
-### `run-gersemi-format`
+### `run-gersemi`
 
 This script allows to check the formatting and/or format of the CMake files and requires ZSH and `gersemi` Python package.