Update Code Scanning workflow now that we no longer need `tools: latest`

The Actions VM image containing v2.7.6 of the CodeQL CLI has now fully
rolled out, so we no longer need to download the latest CodeQL bundle to
use this CLI and include this repo in the ML-powered queries beta.

.github/workflows/codeql.yml

@@ -26,8 +26,6 @@ jobs:
         with:
             languages: javascript
             config-file: ./.github/codeql/codeql-config.yml
-            # We require at least CodeQL CLI v2.7.6 to opt into the ML-powered queries beta. This
-            # can be removed once CodeQL Bundle v2.7.6 ships in the Actions VM images.
             tools: latest
 
       - name: Perform CodeQL Analysis