remove v-callbacks in favor of the callback-prop pattern

Author: yyx990803

component.json

@@ -26,7 +26,6 @@
     "src/config.js",
     "src/directive.js",
     "src/directives/attr.js",
-    "src/directives/callbacks.js",
     "src/directives/class.js",
     "src/directives/cloak.js",
     "src/directives/component.js",

src/directives/callbacks.js

@@ -18,9 +18,6 @@ exports.model      = require('./model')
 exports.repeat     = require('./repeat')
 exports['if']      = require('./if')
 
-// child vm communication directives
-exports.callbacks  = require('./callbacks')
-
 // internal directives that should not be used directly
 // but we still want to expose them for advanced usage.
 exports._component = require('./component')

src/directives/index.js

@@ -65,7 +65,7 @@ function enableDebug () {
       if (id === 'events') {
         exports.warn(
           'v-events has been deprecated in ^0.12.0. ' +
-          'Use v-callbacks instead.'
+          'Pass down methods as callback props instead.'
         )
         return
       }