removed and ignore package-lock.json

no reason to support and maintain both yarn lock and package lock. We
primarily use yarn for all build purposes.

.gitignore

@@ -29,3 +29,5 @@ morgan.log
 yarn-error.log
 
 *.css
+
+package-lock.json

package-lock.json

-{
-  "name": "dspace-angular",
-  "version": "0.0.1",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "@types/webpack-env": {
-      "version": "1.13.1",
-      "resolved": "https://registry.npmjs.org/@types/webpack-env/-/webpack-env-1.13.1.tgz",
-      "integrity": "sha512-oHyg0NssP2RCpCvE35hhbSqMJRsc5lSW+GFe+Vc65JL+kHII1VMYM+0KeV/z4utFuUqPoQRmq8KMMp7ba0dj6Q==",
-      "dev": true
-    }
-  }
-}