V15: Block package should not import from itself (#18902)

* fix: avoids circular dependencies by realising the 'block' package was importing from itself

* chore: lowers requirement to 9 after fixes

* chore: removes unused file

src/Umbraco.Web.UI.Client/devops/circular/index.js

@@ -52,7 +52,7 @@ if (circular.length) {
 	*/
 
 	// TODO: Remove this check and set an exit with argument 1 when we have fixed all circular dependencies.
-	if (circular.length > 11) {
+	if (circular.length > 9) {
 		process.exit(1);
 	} else {
 		process.exit(0);