Remove unused react-addons dependencies

Author: janicduplessis

package.json

@@ -187,9 +187,6 @@
     "plist": "^1.2.0",
     "pretty-format": "^4.2.1",
     "promise": "^7.1.1",
-    "react-addons-create-fragment": "15.5.0-alpha.0",
-    "react-addons-pure-render-mixin": "15.5.0-alpha.0",
-    "react-addons-shallow-compare": "15.5.0-alpha.0",
     "react-clone-referenced-element": "^1.0.1",
     "react-devtools-core": "^2.0.8",
     "react-timer-mixin": "^0.13.2",