del_on_selected.py

import pymel.core as pm

def delete_keys_on_sel():
	selected = pm.selected()
	if not selected:
		return False

	nodes_to_delete = []

	for obj in selected:
		attrs = pm.listAttr(obj, k=True)
		for attr in attrs:
			input_list = getattr(obj, attr).inputs()
			valid_anim_curve = [node for node in input_list if isinstance(node, pm.nt.AnimCurve)]
			if not valid_anim_curve:
				continue
			nodes_to_delete.append(valid_anim_curve)
	pm.delete(nodes_to_delete)
	return True

delete_keys_on_sel()