Remove unnecessary permissions for codeql scan workflow (linode#491)

.github/workflows/codeql.yml

@@ -13,16 +13,8 @@ jobs:
     name: Analyze (${{ matrix.language }})
     runs-on: ubuntu-latest
     permissions:
-      # required for all workflows
       security-events: write
 
-      # required to fetch internal or private CodeQL packs
-      packages: read
-
-      # only required for workflows in private repositories
-      actions: read
-      contents: read
-
     strategy:
       fail-fast: false
       matrix: