react-native example: remove SuppressWarnings and comments from MainApplication.getPackages

Author: perf2711

examples/sdk/reactNative/android/app/src/main/java/com/reactnative/MainApplication.java

@@ -20,10 +20,7 @@ public boolean getUseDeveloperSupport() {
 
     @Override
     protected List<ReactPackage> getPackages() {
-      @SuppressWarnings("UnnecessaryLocalVariable")
       List<ReactPackage> packages = new PackageList(this).getPackages();
-      // Packages that cannot be autolinked yet can be added manually here, for
-      // example:
       packages.add(new BacktraceDemoPackage());
       return packages;
     }