remove unneeded internal header file (#190)

Author: e7mac

Leanplum-SDK/Classes/Features/Actions/LPActionArg-Internal.h

@@ -24,7 +24,6 @@
 
 #import "Leanplum.h"
 #import "LPActionContext-Internal.h"
-#import "LPActionArg-Internal.h"
 #import "LPVar-Internal.h"
 #import "Constants.h"
 #import "LPActionManager.h"

Leanplum-SDK/Classes/Internal/LeanplumInternal.h

@@ -39,8 +39,9 @@
 + (LPActionArg *)argNamed:(NSString *)name withAction:(NSString *)defaultValue;
 + (LPActionArg *)argNamed:(NSString *)name withColor:(UIColor *)defaultValue;
 /**@}*/
-- (NSString *)name;
-- (NSString *)kind;
-- (id)defaultValue;
+
+@property (readonly, strong) NSString *name;
+@property (readonly, strong) id defaultValue;
+@property (readonly, strong) NSString *kind;
 
 @end