Removed un-needed try statement.

Signal/src/AppDelegate.m

@@ -1418,12 +1418,10 @@ static NSTimeInterval launchStartedAt;
     NSArray *messages = (NSArray *)notification.userInfo[@"messages"];
     for (SSKProtoEnvelope *envelope in messages) {
         OWSLogInfo(@"[Loki] Received messages from long polling");
-        @try {
         NSData *envelopeData = envelope.serializedDataIgnoringErrors;
         if (envelopeData != nil) {
             [SSKEnvironment.shared.messageReceiver handleReceivedEnvelopeData:envelopeData];
-            }
+        } else {
-        } @catch (NSException *exception) {
             OWSFailDebug(@"Failed to serialize envelope");
         }
     }

SignalMessaging/Views/AvatarImageView.swift

@@ -3,6 +3,7 @@
 //
 
 import UIKit
+import SignalServiceKit
 
 @objc
 public class AvatarImageView: UIImageView {