Cr50: Remove HOSTCMD task
Cr50: Remove HOSTCMD task

This should have been done along with commit fabb15c70628c44a79.
Nothing invokes the hostcmd task, so let's kill it off.

BUG=none
BRANCH=none
TEST=make buildall; test on cr50

Change-Id: I1f86d21b44392708e0ff7cc9173b47edda129e00
Signed-off-by: Bill Richardson <129945214b1d548d8e49b6c29c43094f8c78057f@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/339225
Reviewed-by: Randall Spangler <62698fdbb84d1779579ee80c3f39fac22017e5bc@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec