refactor(@angular-devkit/build-angular): remove branch that checks for ɵmod

Under VE this symbol exists in ngfactories and hence it is not safe to use it to determine if the app is running under ivy

Author: alan-agius4

packages/angular_devkit/build_angular/plugins/webpack/analytics.ts

@@ -163,10 +163,8 @@ export class NgBuildAnalyticsPlugin {
       this._stats.numberOfComponents += numIvyComponents;
 
       // Check whether this is an Ivy app so that it can reported as part of analytics.
-      if (!this._stats.isIvy) {
-        if (numIvyComponents > 0 || module._source.source().includes('ɵmod')) {
-          this._stats.isIvy = true;
-        }
+      if (!this._stats.isIvy && numIvyComponents > 0) {
+        this._stats.isIvy = true;
       }
     }
   }