Ok, then why the issue about feeding tubes, just remove the ventilator and that will resolved the issue.
The judge who ruled Jahi McMath dead took a rare, if not unprecedented, move and ruled that the family had until a certain date to find another facility to accept Jahi McMath's body. He also ruled that the hospital had to maintain cardiopulmonary support until Jahi McMath's body was removed from the hospital.
This is unusual, because when a patient is brain dead, California Health and Safety Code Section 1254.4 only requires that a hospital provide a "reasonably brief period" to the patient's family before disconnecting cardiopulmonary support.
"Reasonably brief period" means an amount of time afforded to gather family or next of kin at the patient's bedside.
After brain death, and other than cardiopulmonary support, the statute provides that "no other medical intervention is required." Hence, it's not required to provide feeding tubes or nutrition to a brain dead patient. The hospital did not do so and the judge who ruled Jahi dead did not order that nutrition be provided.
The family waited until it was right against the deadline set by the judge - the point where the hospital had the right to disconnect cardiopulmonary support - before it had the body moved.