[bootanimation] Drop user loadable bootanimation.zip abiltiy.

A prior change removed the ability of
the shell to push to /data/local. Because
of this, the bootanimation code no longer
supports users loading custom bootanimation.zip
files. This patch drops the access attempt
from the code.

Change-Id: Ie30dd73699c8296be00dc6fbf14691e08baa6410
Signed-off-by: rpcraig <rpcraig@tycho.ncsc.mil>