Revert "ANDROID: mm: add get_each_object_track function"

This reverts commit 1fb8e678.

It causes build errors in 5.15-rc1 and there are no in-kernel users of
this api so remove it.  If it is needed, someone can easily add a
working version of it back.

Bug: 177377077
Cc: Vijayanand Jitta <vjitta@codeaurora.org>
Cc: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I74fe57124b74e9695636d139b1f548b69fbc9039