remove OAL headers include

Author: s1ddok

cocos2d/CCActionInstant.m

@@ -30,7 +30,6 @@
 #import "CCNode.h"
 #import "CCSprite.h"
 #import <objc/message.h>
-#import "OALSimpleAudio.h"
 
 //
 // InstantAction

cocos2d/Platforms/iOS/CCAppDelegate.m

@@ -33,8 +33,6 @@
 #import "CCScheduler.h"
 #import "CCGLView.h"
 
-#import "OALSimpleAudio.h"
-
 #if __CC_METAL_SUPPORTED_AND_ENABLED
 #import "CCMetalView.h"
 #endif

cocos2d/cocos2d.h

@@ -85,9 +85,6 @@
 // Shaders
 #import "CCShader.h"
 
-// Sound
-#import "OALSimpleAudio.h"
-
 // Retiring
 #import "CCAnimation.h" // put this back for v3.4 because it's still in use, and would otherwise be unavailable to Swift
 //#import "CCAnimationCache.h"