[iOS] Remove unused methods from Hover (#4139)

## Description

Removes unused methods from `RNHoverHandler`

## Test plan

Compile test app

Author: j-piasecki

packages/react-native-gesture-handler/apple/Handlers/RNHoverHandler.m

@@ -56,16 +56,6 @@ - (void)handleGesture:(UIHoverGestureRecognizer *)recognizer
   [_gestureHandler handleGesture:self];
 }
 
-- (void)triggerAction
-{
-  [_gestureHandler handleGesture:self fromReset:NO fromManualStateChange:NO];
-}
-
-- (void)cancel
-{
-  self.enabled = NO;
-}
-
 - (void)reset
 {
   [super reset];