keep one core-js helper file in git, remove babel-runtime from deps (#5540)

packages/babel-plugin-transform-decorators/package.json

@@ -13,7 +13,6 @@
   ],
   "dependencies": {
     "babel-plugin-syntax-decorators": "7.0.0-alpha.3",
-    "babel-runtime": "7.0.0-alpha.3",
     "babel-template": "7.0.0-alpha.3"
   },
   "devDependencies": {

packages/babel-plugin-transform-react-inline-elements/package.json

@@ -8,9 +8,6 @@
   "keywords": [
     "babel-plugin"
   ],
-  "dependencies": {
-    "babel-runtime": "7.0.0-alpha.3"
-  },
   "devDependencies": {
     "babel-helper-plugin-test-runner": "7.0.0-alpha.3"
   }

packages/babel-runtime/core-js/map.js

@@ -0,0 +1 @@
+module.exports = { "default": require("core-js/library/fn/map"), __esModule: true };