only assert queues in debug

// FREEBIE

src/Messages/OWSMessageSender.m

@@ -44,9 +44,11 @@ NS_ASSUME_NONNULL_BEGIN
 
 void AssertIsOnSendingQueue()
 {
+#ifdef DEBUG
     if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(10, 0)) {
         dispatch_assert_queue([OWSDispatch sendingQueue]);
     } // else, skip assert as it's a development convenience.
+#endif
 }
 
 /**

src/Storage/AxolotlStore/TSStorageManager+SessionStore.m

@@ -8,9 +8,11 @@
 
 void AssertIsOnSessionStoreQueue()
 {
+#ifdef DEBUG
     if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(10, 0)) {
         dispatch_assert_queue([OWSDispatch sessionStoreQueue]);
     } // else, skip assert as it's a development convenience.
+#endif
 }
 
 @implementation TSStorageManager (SessionStore)