Revert "ima: policy for RAMFS"

commit 08de59eb144d7c41351a467442f898d720f0f15f upstream.

This reverts commit 4c2c3927.

Everything in the initramfs should be measured and appraised,
but until the initramfs has extended attribute support, at
least measured.

Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>