Fixed compile warning with initWithRequest.

Author: jkasten2

iOS_SDK/OneSignalSDK/Source/OneSignalHelper.m

@@ -105,8 +105,7 @@ + (BOOL)downloadItemAtURL:(NSURL*)url toFile:(NSString *)localPath error:(NSErro
     NSMutableURLRequest* request = [[NSMutableURLRequest alloc] initWithURL:url];
 
     DirectDownloadDelegate* delegate = [[DirectDownloadDelegate alloc] initWithFilePath:localPath];
-    // TODO: Try cleaning up warning with connectionWithRequest
-    [[NSURLConnection alloc] initWithRequest:request delegate:delegate];
+    [NSURLConnection connectionWithRequest:request delegate:delegate];
 
     while ([delegate isDone] == NO) {
         [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:1.0]];