Remove unused react-addons dependencies

Summary:
We don't export addons anymore so we can remove those.

cc bvaughn
Closes #13244

Reviewed By: hramos

Differential Revision: D4836676

Pulled By: ericvicenti

fbshipit-source-id: 430ebd2b049e90f3e27e2420c8316bbbe2274baa

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",