Maya: Remove selected cameras (including startup cameras)

remove_cameras.py

from maya import cmds

def is_camera(node):
    cond = (
        "camera" in [cmds.nodeType(x) for x in (cmds.listRelatives(node, s=True, f=True) or [])],
        cmds.nodeType(node) == "camera",
    )
    return any(cond)

cameras = [c for c in cmds.ls(sl=True, l=True) if is_camera(c)]
print cameras
if len(cameras):
    for c in cameras:
        cmds.camera(c, e=True, sc=False)
    cmds.delete(cameras)