Remove related community button shown to those who don't have permission #5634

Description

This is in #riot, and I obviously don't have permission to modify this list. The X shouldn't be shown to me.

Trying to remove a group and save the room thankfully fails.

Steps to reproduce

• As a room owner, set up some related groups
• As a regular user, try to remove those groups

Version information

• Platform: web (in-browser)
• Browser: Chrome 62
• OS: Windows 10
• URL: riot.im/develop