ci: disable redundant Angular bot size check

The E2E test suite contains a production build test (`build/prod-build`) that performs
a size comparison check to ensure a production build of a newly generated application
stays within 10% of a predefined value (currently 124,000 bytes).
As a result of this preexisting check, the need to perform another check that involves
the added complexity of Github status hooks and API calls is currently not needed.

(cherry picked from commit b5758ac)

Author: clydin

.github/angular-robot.yml

@@ -93,6 +93,8 @@ triage:
 
 # Size checking
 size:
+  # Size checking for production build is performed via the E2E test `build/prod-build`
+  disabled: true
   circleCiStatusName: 'ci/circleci: e2e-cli'
   maxSizeIncrease: 10000
   comment: false

tests/legacy-cli/e2e/tests/build/prod-build.ts

@@ -24,8 +24,6 @@ function verifySize(bundle: string, baselineBytes: number) {
 }
 
 export default async function () {
-  // TODO(architect): Delete this test. It is now in devkit/build-angular.
-
   // Can't use the `ng` helper because somewhere the environment gets
   // stuck to the first build done
   const bootstrapRegExp = /bootstrapModule\([_a-zA-Z]+[0-9]*\)\./;