system/extras: Delete ksmutils

We want to remove libpagemap. ksmutils is the only C code that needs it
right now. Remove it instead of doing the C++ rewrite, cause it's not
worth it since we don't even recommend enabling ksm for Android anymore.

Bug: 111694435
Test: none

Change-Id: I4c4e82d9febecb3103660ff5dbe1adb7b3bc3452
Signed-off-by: Sandeep Patil <sspatil@google.com>
5 files changed