Revert "init: adding fallback paths for debug ramdisk"

This reverts commit 6cb4311f4dd2498755d4446aa0f9ade4b69bc9b5.

Reason for revert: no need to keep the compatibility now

Bug: 186485355
Change-Id: Iffdf3abebc17f32e36f3b3fe2b4f9c2592da9653
Test: TreeHugger
1 file changed