Remove react-addons-test-utils dependency

Author: dapi

package.json

@@ -97,7 +97,6 @@
     "prettier": "1.14.3",
     "pretty-quick": "^1.7.0",
     "react": "^16.8.0",
-    "react-addons-test-utils": "^15.6.2",
     "react-dom": "^16.8.0",
     "react-i18next": "^10.11.0",
     "react-test-renderer": "^16.8.6",

yarn.lock

@@ -11657,11 +11657,6 @@ react-addons-create-fragment@^15.5.3:
     loose-envify "^1.3.1"
     object-assign "^4.1.0"
 
-react-addons-test-utils@^15.6.2:
-  version "15.6.2"
-  resolved "https://registry.yarnpkg.com/react-addons-test-utils/-/react-addons-test-utils-15.6.2.tgz#c12b6efdc2247c10da7b8770d185080a7b047156"
-  integrity sha1-wStu/cIkfBDae4dw0YUICnsEcVY=
-
 react-dev-utils@^6.1.0:
   version "6.1.1"
   resolved "https://registry.yarnpkg.com/react-dev-utils/-/react-dev-utils-6.1.1.tgz#a07e3e8923c4609d9f27e5af5207e3ca20724895"