remove uninstall token upload request

Summary:
1. Since we already attach device token when we send events, we can deprecate uninstall token upload request.
2. Remove outdated comments in coffeeshop
3. Hold this diff until device token aggregated pipeline is launched.

Reviewed By: codytwinton

Differential Revision: D13717727

fbshipit-source-id: 494d3c62d38f699b3f994d58f8ab7bad854af330

FBSDKCoreKit/FBSDKCoreKit/FBSDKAppEvents.m

@@ -659,23 +659,6 @@ + (void)setPushNotificationsDeviceTokenString:(NSString *)deviceTokenString
     if ([FBSDKAppEvents flushBehavior] != FBSDKAppEventsFlushBehaviorExplicitOnly) {
       [[FBSDKAppEvents singleton] flushForReason:FBSDKAppEventsFlushReasonEagerlyFlushingEvent];
     }
-
-    // Update device push token for uninstall tracking
-    [FBSDKServerConfigurationManager loadServerConfigurationWithCompletionBlock:^(FBSDKServerConfiguration *serverConfiguration, NSError *error) {
-      if (serverConfiguration.uninstallTrackingEnabled) {
-        FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc]
-                                      initWithGraphPath:[NSString stringWithFormat:@"%@/%@",
-                                                         [FBSDKSettings appID], UNINSTALL_TRACKING_TOKEN_ENDPOINT]
-                                      parameters:@{
-                                                   UNINSTALL_TRACKING_DEVICE_TOKEN_KEY: deviceTokenString,
-                                                   UNINSTALL_TRACKING_PLATFORM_KEY: @"ios",
-                                                   // advertiserID could be 0s if user select limit ad tracking
-                                                   UNINSTALL_TRACKING_DEVICE_ID_KEY:  [FBSDKAppEventsUtility advertiserID] ?: @""
-                                                   }
-                                      HTTPMethod:@"POST"];
-        [request startWithCompletionHandler:nil];
-      }
-    }];
   }
 }