Update CodeQL workflow to match Vega Strike Engine

.github/workflows/codeql.yml

@@ -7,9 +7,7 @@ name: CodeQL
 
 on:
   push:
-    # branches: ['master', '[0-9]?.[0-9]?.x']
   pull_request:
-    # branches: ['master', '[0-9]?.[0-9]?.x']
 
 jobs:
   analyze:
@@ -29,15 +27,8 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v2
       with:
-        # We must fetch at least the immediate parents so that if this is
-        # a pull request then we can checkout the head.
         fetch-depth: 2
 
-    # If this run was triggered by a pull request event, then checkout
-    # the head of the pull request instead of the merge commit.
-    - run: git checkout HEAD^2
-      if: ${{ github.event_name == 'pull_request' }}
-
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v1
@@ -48,18 +39,6 @@ jobs:
         # Prefix the list here with "+" to use these queries and those in the config file.
         # queries: ./path/to/local/query, your-org/your-repo/queries@main
 
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
-    # - name: Autobuild
-    #   uses: github/codeql-action/autobuild@v1
-
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 https://git.io/JvXDl
-
-    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
-    #    and modify them (or add more) to build your code if your project
-    #    uses a compiled language
-
     - name: Bootstrap and Build the Code
       run: script/cibuild