removed unused fields

dist/gui/package.json

@@ -32,7 +32,5 @@
     },
     "engines": {
         "node": "*"
-    },
-    "_id": "babylonjs-gui@3.1.0-alpha1",
-    "_from": "babylonjs-gui@"
+    }
 }

package.json

@@ -64,7 +64,5 @@
         "node": "*"
     },
     "readme": "Babylon.js is a 3D engine based on webgl and javascript",
-    "readmeFilename": "README.md",
-    "_id": "babylonjs@3.1.0-alpha2",
-    "_from": "babylonjs@"
+    "readmeFilename": "README.md"
 }