Revert "Check filepath inside block map file as well"

it makes no sense to check this path is canonical.
this path would for example show:
"/dev/block/bootdevice/by-name/userdata" - depending on uncrypt zip location.
canonical will than always return the real block file, for example: /dev/block/sda31
they will always be different, which will always make CheckPathCanonical return false.

checking for the real uncrypt file's location also doesn't make any sense.
because it "doesn't exist". it's being accessed directly (block access) when flashed.

google forgot about A-only devices.... I have nothing else to say.

This reverts commit 8e34d47e.

Change-Id: I65e5e3fcc61a6ac9b4f07bec328f3796d5e7c361