Remove double back key press to close the app

app/src/main/java/net/moasdawiki/app/MainActivity.java

@@ -88,7 +88,6 @@ public class MainActivity extends AppCompatActivity {
     private RequestDispatcher requestDispatcher;
 
     private WebView webview;
-    private long backButtonPressedTimestamp;
 
     private ExecutorService synchronizationExecutorService;
 
@@ -273,17 +272,8 @@ public class MainActivity extends AppCompatActivity {
         if (backForwardList.getCurrentIndex() > 0) {
             webview.goBack();
         } else {
-            long currentTimeMillis = System.currentTimeMillis();
-            if (backButtonPressedTimestamp + 5000 < currentTimeMillis) {
-                // First click on back button or previous click was more than 5 seconds ago
-                Log.d(TAG, "Back button 1x, show close hint");
-                showToast(getString(R.string.action_back_close_hint));
-                backButtonPressedTimestamp = currentTimeMillis;
-            } else {
-                // Second click on back button within 5 seconds -> close app
-                Log.d(TAG, "Back button 2x, closing app");
-                finish();
-            }
+            // Close app
+            finish();
         }
     }