Update codeql-analysis.yml

https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/troubleshooting-the-codeql-workflow#warning-git-checkout-head2-is-no-longer-necessary

Author: ramsessanchez

.github/workflows/codeql-analysis.yml

@@ -18,21 +18,12 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v3
-      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
 
     - uses: actions/setup-java@v3
       with:
         distribution: 'adopt'
         java-version: 18
 
-    # 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@v2