Revert 702 master (arana-db#704)

* Revert "fix go test (arana-db#702)"

This reverts commit ad211a5.

* fix CodeQL problems (arana-db#703)

* fix go test

* Update codeql-analysis.yml

* fix CodeQL problems

.github/workflows/codeql-analysis.yml

@@ -44,11 +44,6 @@ jobs:
           # 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@v2