Revert "iOS: Account for when the older SDK is used when building"

This reverts commit 631efee293.

Reason for revert: This causes a problem when running on iOS 11 devices.

Change-Id: If5194989b8d7a9f4cf2d72e770fdaad754d7e236
Reviewed-by: Jani Heikkinen <jani.heikkinen@qt.io>

src/plugins/platforms/ios/quiview.h

@@ -70,8 +70,3 @@ QT_END_NAMESPACE
 @property (nonatomic, readonly) UIEdgeInsets qt_safeAreaInsets;
 @end
 
-#if !QT_IOS_PLATFORM_SDK_EQUAL_OR_ABOVE(130000)
-@interface UITextInteraction : NSObject
-@end
-#endif
-

src/plugins/platforms/ios/quiview.mm

@@ -628,6 +628,7 @@ Q_LOGGING_CATEGORY(lcQpaTablet, "qt.qpa.input.tablet")
 #endif
 }
 
+#if QT_IOS_PLATFORM_SDK_EQUAL_OR_ABOVE(130000)
 - (void)addInteraction:(id<UIInteraction>)interaction
 {
     if (__builtin_available(iOS 13.0, *)) {
@@ -637,6 +638,7 @@ Q_LOGGING_CATEGORY(lcQpaTablet, "qt.qpa.input.tablet")
 
     [super addInteraction:interaction];
 }
+#endif
 
 @end