Remove the shape operators from TOSA specification

After working with the shape operators, it appears that their inclusion
in TOSA is premature. We are removing them to avoid having them be a
compatibility burden in the future.

Signed-off-by: Eric Kunze <eric.kunze@arm.com>
Change-Id: Ib65a2ea87378bd47c8458ff69a3280a0d5ef2b6d