Custom OAuth only partially removed when clicking "Remove custom oauth".

Description:

Custom OAuth only partially removed when clicking "Remove custom oauth".

Steps to reproduce:

1. Login and go to administration
2. Create new custom OAuth.
3. After creating it try to remove it with REMOVE CUSTOM OAUTH button.

Expected behavior:

Custom oauth is removed

Actual behavior:

Custom oauth is partially removed

1. The custom oauth remains listed.
2. Roles/Groups field for channel mapping remains in listed custom oauth
3. User Data Group Map remains in listed custom oauth
4. Map Roles/Groups to channels remains in listed custom oauth
5. OAuth Group Channel Map remains in listed custom oauth

Server Setup Information:

• Version of Rocket.Chat Server: 3.12.1
• Operating System: Ubuntu 20.04
• Deployment Method: snap
• Number of Running Instances: 1
• DB Replicaset Oplog: Enabled
• NodeJS Version: v12.18.4
• MongoDB Version: 3.6.14 / wiredTiger (oplog Enabled)

Client Setup Information

• Desktop App or Browser Version: Browser - Chrome
• Operating System: Windows 10

Additional context

#19910
#19909
#9920

No source file or test is named in the issue. Reproduce the removal through the administration flow, then trace the custom OAuth deletion behavior and its displayed mappings; done means the custom OAuth is no longer listed and none of its mapping fields remain.