chore: kill codeQL for PRs

It's never been useful once and takes forever to run

Author: tivac

.github/workflows/codeql-analysis.yml

@@ -8,9 +8,6 @@ name: "CodeQL"
 on:
   push:
     branches: [main]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [main]
   schedule:
     - cron: '0 22 * * 4'