Mode and Modifier toggles for Remove Component and Remove Overdrivers.
Bake Component - Animation from removed Components will be baked to the skeleton.
Revert Animation - Animation from the removed Components or OverDrivers will be lost and the animation curves that were on the joint or control prior to rigging will be restored.
Force Remove - Remove Components by force deleting all component objects and networks.
Should only be used on broken Rig Components.