Remove git checkout HEAD^2

Author: KosherJava

.github/workflows/codeql-analysis.yml

@@ -38,7 +38,7 @@ jobs:
 
     # 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
+    # - run: git checkout HEAD^2
       if: ${{ github.event_name == 'pull_request' }}
 
     # Initializes the CodeQL tools for scanning.