Remove additional shellcheck permissions

Signed-off-by: Robert Young <robertyoungnz@gmail.com>

Author: robobario

.github/workflows/lint.yaml

@@ -29,10 +29,6 @@ concurrency:
 jobs:
   lint:
     runs-on: ubuntu-latest
-    permissions:
-      contents: read
-      pull-requests: write
-      checks: write
     steps:
       - name: 'Check out repository'
         uses: actions/checkout@v6