Revert "BACKPORT: mm, compaction: be selective about what pageblocks to clear skip hints"

This reverts commit fd9c71c0.

Reason for revert: revert customized code
Bug: 140544941
Test: boot
Signed-off-by: Minchan Kim <minchan@google.com>
Signed-off-by: Martin Liu <liumartin@google.com>
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I58d978c6f74f8a1a04b17fa6d3890ddc4f1988c0