Remove njs-modules configmap

[kate-osborn]

Proposed changes

Problem: PR #934 did not remove the njs modules configmap from the manifests directory.

Solution: Remove the njs modules configmap.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[sjberman]

Looks like there are a couple more njs-modules references if you do a grep.

[kate-osborn]

Looks like there are a couple more njs-modules references if you do a grep.

Removed. Thanks for catching!