Remove unnecessary babel plugin

Author: chinrichs-godaddy

.babelrc

@@ -1,10 +1,14 @@
 {
   "presets": [
-    "@babel/preset-env",
+    [
+      "@babel/preset-env",
+      {
+        "shippedProposals": true
+      }
+    ],
     "@babel/preset-react"
   ],
   "plugins": [
-    "@babel/plugin-transform-runtime",
-    "@babel/plugin-proposal-class-properties"
+    "@babel/plugin-transform-runtime"
   ]
 }

package.json

@@ -40,13 +40,12 @@
     "prop-types": "^15.7.2"
   },
   "devDependencies": {
-    "@babel/cli": "^7.0.0",
-    "@babel/core": "^7.12.3",
-    "@babel/plugin-proposal-class-properties": "^7.12.1",
+    "@babel/cli": "^7.12.8",
+    "@babel/core": "^7.12.9",
     "@babel/plugin-transform-runtime": "^7.12.1",
-    "@babel/preset-env": "^7.12.1",
-    "@babel/preset-react": "^7.12.1",
-    "@babel/register": "^7.0.0",
+    "@babel/preset-env": "^7.12.7",
+    "@babel/preset-react": "^7.12.7",
+    "@babel/register": "^7.12.1",
     "@storybook/react": "^5.2.6",
     "autoprefixer": "^10.0.4",
     "babel-eslint": "^10.1.0",