Remove old exports

Author: quezo

package.json

@@ -29,15 +29,6 @@
   },
   "main": "./lib/index.js",
   "module": "./lib/index.es6.js",
-  "browser": "./dist/diff.js",
-  "unpkg": "./dist/diff.js",
-  "exports": {
-    ".": {
-      "import": "./lib/index.mjs",
-      "require": "./lib/index.js"
-    },
-    "./package.json": "./package.json"
-  },
   "scripts": {
     "clean": "rm -rf lib/ dist/",
     "build:node": "yarn babel --out-dir lib  --source-maps=inline src",