build: remove unused dependency

`@angular/platform-browser-dynamic` is not used.

Author: alan-agius4

apps/code-of-conduct/package.json

@@ -9,7 +9,6 @@
     "@angular/forms": "21.0.0-next.8",
     "@angular/material": "21.0.0-next.9",
     "@angular/platform-browser": "21.0.0-next.8",
-    "@angular/platform-browser-dynamic": "21.0.0-next.8",
     "@angular/router": "21.0.0-next.8",
     "@octokit/rest": "",
     "rxjs": "7.8.2",