Remove Notification Settings for Self-Hosted Users

[lucasvaltl]

Is your feature request related to a problem? Please describe

Currently, a user of Gitpod Self-Hosted sees the notification settings under the settings tab. However, we do not support sending notifications to or via Self-Hosted instances as of today (internal conversation)

Describe the behaviour you'd like

Remove this page for Gitpod Self-Hosted users only - until we decide to have email notifications again.

Describe alternatives you've considered

Do nothing - which would confuse users, see #8531

Additional context

#8531

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.