diff --git a/ios/Classes/FlutterUnityWidgetPlugin.h b/ios/Classes/FlutterUnityWidgetPlugin.h
index a3eff36..013da00 100644
--- a/ios/Classes/FlutterUnityWidgetPlugin.h
+++ b/ios/Classes/FlutterUnityWidgetPlugin.h
@@ -6,12 +6,11 @@
 //
 
 #import <Flutter/Flutter.h>
-#import <UnityUtils.h>
 
 @interface FlutterUnityWidgetPlugin : NSObject<FlutterPlugin>
 @end
 
-@interface FUController : NSObject <FlutterPlatformView, UnityEventListener>
+@interface FUController : NSObject <FlutterPlatformView>
 
 - (instancetype)initWithFrame:(CGRect)frame
                viewIdentifier:(int64_t)viewId
@@ -19,7 +18,6 @@
               registrar:(NSObject<FlutterPluginRegistrar> *)registrar;
 
 - (UIView*)view;
-- (void)onMessage:(NSString *)message;
 @end
 
 @interface FUViewFactory : NSObject <FlutterPlatformViewFactory>
diff --git a/ios/Classes/FlutterUnityWidgetPlugin.m b/ios/Classes/FlutterUnityWidgetPlugin.m
index 7a71162..f15525b 100644
--- a/ios/Classes/FlutterUnityWidgetPlugin.m
+++ b/ios/Classes/FlutterUnityWidgetPlugin.m
@@ -67,10 +67,6 @@
     return self;
 }
 
-- (void)onMessage:(NSString *)message {
-    [_channel invokeMethod:@"onUnityMessage" arguments:message];
-}
-
 - (void)onMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
     if ([[call method] isEqualToString:@"postMessage"]) {
         [self postMessage:call result:result];
diff --git a/ios/Classes/UnityUtils.h b/ios/Classes/UnityUtils.h
index ea3420c..303447b 100644
--- a/ios/Classes/UnityUtils.h
+++ b/ios/Classes/UnityUtils.h
@@ -23,11 +23,6 @@ extern "C" {
 } // extern "C"
 #endif
 
-
-@protocol UnityEventListener <NSObject>
-- (void)onMessage:(NSString *)message;
-@end
-
 @interface UnityUtils : NSObject
 
 + (BOOL)isUnityReady;
diff --git a/ios/Classes/UnityUtils.mm b/ios/Classes/UnityUtils.mm
index 348b636..0496f32 100644
--- a/ios/Classes/UnityUtils.mm
+++ b/ios/Classes/UnityUtils.mm
@@ -153,7 +153,7 @@ static BOOL _isUnityReady = NO;
         UnityAppController *controller = GetAppController();
         [controller application:application didFinishLaunchingWithOptions:nil];
         [controller applicationDidBecomeActive:application];
-        
+
         [UnityUtils listenAppState];
     });
 }