fix: [AA-1207] Remove redundant API fields (#873)

Remove redundant fields from courseware API. These are all found in courseHome: 

- number
- org
- originalUserIsStaff
- isStaff
- verifiedMode
- isMasquerading (virtual field from isStaff and originalUserIsStaff)

src/shared/data/__factories__/courseMetadataBase.factory.js

@@ -8,13 +8,4 @@ export default new Factory()
   .option('host')
   .attrs({
     id: 'course-v1:edX+DemoX+Demo_Course',
-    is_staff: false,
-    original_user_is_staff: false,
-    number: 'DemoX',
-    org: 'edX',
-    verified_mode: {
-      upgrade_url: 'test',
-      price: 10,
-      currency_symbol: '$',
-    },
   });