Remove "browser" field from package.json

This field is unnecessary because `html-dom-parser` handles the
"browser" field.

Author: remarkablemark

package.json

@@ -45,9 +45,5 @@
     "react": ">=15.4",
     "react-dom": ">=15.4"
   },
-  "browser": {
-    "htmlparser2/lib/Parser": false,
-    "domhandler": false
-  },
   "license": "MIT"
 }