[WEEX-200][iOS] deprecate wxcallback and wxmodulecallback

As iOS  developers knows, we cannot distinguish the block by its params count, but it has been a time we use the default value of block parameter, I find out  that the default value could be dirty data.

here is the callback type  definition.

typedef void (^WXCallback)(_Nonnull id result)

typedef void (^WXKeepAliveCallback)(_Nonnull id result, BOOL keepAlive);

when the method called, weexSDK will set the callback according to the @encode result,

but these two type's encode result are all "?", see more encode result from Apple Documents https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtTypeEncodings.html

Bug:200
close #1000
1 file changed