build: remove obsolete keys which are added by ng-packagr

Author: juristr

package.json

@@ -3,14 +3,11 @@
   "name": "ngx-tabs-libdemo",
   "version": "0.0.0-development",
   "description": "Demo library to showcase Angular packaging format",
-  "main": "./bundles/ngx-tabs-libdemo.umd.js",
-  "module": "./esm5/ngx-tabs-libdemo.js",
-  "es2015": "./esm2015/ngx-tabs-libdemo.js",
-  "typings": "./ngx-tabs-libdemo.d.ts",
   "scripts": {
     "build": "ng-packagr -p package.json",
     "copyPackageJson": "copyfiles package.json dist",
-    "semantic-release": "semantic-release pre && npm run copyPackageJson && npm publish dist && semantic-release post"
+    "semantic-release":
+      "semantic-release pre && npm run copyPackageJson && npm publish dist && semantic-release post"
   },
   "author": "Juri Strumpflohner",
   "license": "MIT",