Revert "Avoid unlinking app image file"

Need unlink or the image file can change while being mmaped.

Bug: 27493510

This reverts commit 310c5e70b2e36df36811b6de7ad5c2ebd82338e5.

Change-Id: Ied09848e0b646f946f20f2ed114cac6b438bcda1
1 file changed