Fix alert not being shown in CrashOnly build

In previous versions, the CrashOnly build could not display the alert to ask the user for permission to send the crash report because the necessary method implementations were missing.

Classes/BITHockeyBaseManager.m

@@ -202,9 +202,6 @@
 }
 
 - (UIViewController *)visibleWindowRootViewController {
-  // if we compile Crash only, then BITHockeyBaseViewController is not included
-  // in the headers and will cause a warning with the modulemap file
-#if HOCKEYSDK_FEATURE_AUTHENTICATOR || HOCKEYSDK_FEATURE_UPDATES || HOCKEYSDK_FEATURE_FEEDBACK
   UIViewController *parentViewController = nil;
   
   if ([[BITHockeyManager sharedHockeyManager].delegate respondsToSelector:@selector(viewControllerForHockeyManager:componentManager:)]) {
@@ -234,19 +231,12 @@
   }
   
   return parentViewController;
-#else
-  return nil;
-#endif
 }
 
 - (void)showAlertController:(UIViewController *)alertController {
   
   // always execute this on the main thread
   dispatch_async(dispatch_get_main_queue(), ^{
-    
-    // if we compile Crash only, then BITHockeyBaseViewController is not included
-    // in the headers and will cause a warning with the modulemap file
-#if HOCKEYSDK_FEATURE_AUTHENTICATOR || HOCKEYSDK_FEATURE_UPDATES || HOCKEYSDK_FEATURE_FEEDBACK
     UIViewController *parentViewController = [self visibleWindowRootViewController];
     
     // as per documentation this only works if called from within viewWillAppear: or viewDidAppear:
@@ -260,7 +250,6 @@
     if (parentViewController) {
       [parentViewController presentViewController:alertController animated:YES completion:nil];
     }
-#endif
   });
 }