Revert "fix: explicitly import dependencies, instead of relying on PCH files. This is important in Swift projects, where you cannot use prefix headers. (#927)"

This reverts commit 31860cf.

Author: NiklasMerz

src/ios/CDVInAppBrowserNavigationController.h

@@ -17,7 +17,6 @@
  under the License.
  */
 
-#import <UIKit/UINavigationController.h>
 #import <Cordova/CDVScreenOrientationDelegate.h>
 
 

src/ios/CDVInAppBrowserOptions.h

@@ -17,7 +17,6 @@
  under the License.
  */
 
-#import <Foundation/Foundation.h>
 
 @interface CDVInAppBrowserOptions : NSObject {}