Bulk removing tags from Guru Cards:
Via the Card Manager:
Navigate to the Card Manager
Filter for and select the Cards that you want to remove tags for
Click on the "Tag" icon and select which tag(s) you want to remove from the selected Cards:
Via the Tag Manager:
You can permanently delete tags from the Tag Manager.
Navigate to the Tag Management tab under Team Settings
Click on the tag you want to delete
Click on Delete. You will see a note sharing how many tags this deletion will impact.