fix: remove duplicate imports when migrating standalone components

Author: sean-perkins

packages/cli/src/angular/migrations/standalone/0002-import-standalone-component.ts

@@ -154,6 +154,12 @@ async function migrateAngularComponentClass(
         componentClassName,
         "@ionic/angular/standalone",
       );
+      /**
+       * This removes the import from the class, if it is present.
+       * An example where it may exist is when the developer has
+       * a @ViewChild decorator that references an ionic component.
+       */
+      removeImportFromClass(sourceFile, componentClassName, "@ionic/angular");
     } else if (ngModuleSourceFile) {
       const componentClassName = kebabCaseToPascalCase(ionicComponent);