Only a Group Admin can remove you as a Moderator. If you're a Group admin, simply:
- Open the Insight Timer app on your device.
 - Tap the menu icon (☰) in the top-left corner.
 - Scroll down and select "Groups".
 - Select the Group.
 - Tap Settings at the top right corner of the page.
 - Scroll down and select the profile.
 - Click Remove Moderator.