Usage: channelgroupdelperm cgid={groupID} [permid={permID}...]
       [permsid={permName}...]

Permissions:
  i_group_modify_power
  i_group_needed_modify_power
  i_permission_modify_power

Description:
  Removes a set of specified permissions from the channel group. Multiple
  permissions can be removed at once. A permission can be specified by permid
  or permsid.

Example:
  channelgroupdelperm cgid=16 permid=17276|permid=21415
  error id=0 msg=ok