Made requested changes.

PrebidMobile/PrebidMobile-core/src/main/java/org/prebid/mobile/rendering/networking/modelcontrollers/Requester.java

@@ -83,30 +83,9 @@ public abstract class Requester {
 
  public abstract void startAdRequest();
 
- /**
- * This Async task is needed because the networkTask needs to be cancelled / destroyed
- * on a background thread or it throws a NetworkOnMainThreadException
- **/
- private static class DestroyNetworkTaskAsyncTask extends AsyncTask<BaseNetworkTask, Void, Void> {
-
- @Override
- protected Void doInBackground(BaseNetworkTask... baseNetworkTasks) {
- if (baseNetworkTasks.length > 0) {
- if (baseNetworkTasks[0] != null) {
- baseNetworkTasks[0].cancel(true);
- }
- }
- return null;
- }
- }
-
  public void destroy() {
  if (networkTask != null) {
- if(Looper.getMainLooper().getThread() == Thread.currentThread()) {
- new DestroyNetworkTaskAsyncTask().execute(networkTask);
- } else {
- networkTask.cancel(true);
- }
+ networkTask.cancel(true);
  }
  networkTask = null;
  if (fetchAdIdInfoTask != null) {