ci: remove angular rules repositories from renovate workflow

This repos have been merged into dev-infra.

Author: alan-agius4

.github/workflows/ng-renovate.yml

@@ -25,9 +25,6 @@ jobs:
           - angular/angular-cli
           - angular/ai-tutor
           - angular/web-codegen-scorer
-          - angular/rules_browsers
-          - angular/rules_sass
-          - angular/rules_angular
     runs-on: ubuntu-latest
     steps:
       # Because the checkout and setup node action is contained in the dev-infra repo, we must