Update codeql-analysis.yml

Author: chicio

.github/workflows/codeql-analysis.yml

@@ -17,10 +17,6 @@ jobs:
         # 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' }}
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v1
     - name: Perform CodeQL Analysis