Removed unused dependency which caused issues with npm v7

Author: vahissan

package.json

@@ -92,7 +92,6 @@
     "postcss-safe-parser": "4.0.1",
     "pre-commit": "^1.1.3",
     "react": "^16.5.0",
-    "react-addons-test-utils": ">=0.13",
     "react-app-polyfill": "^1.0.5",
     "react-dev-utils": "10.1.0",
     "react-dom": "^16.5.0",