Revert "CHROMIUM: mm: multigenerational lru: enable by default"

This reverts commit 87606de6.

BUG=b:265245396
TEST=Confirm that the kernel can be successfully built

Change-Id: I98d6d1ee397423c4b7e4549100be3b8979e24887
Signed-off-by: Koki Ryu <kokiryu@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/4199124


Commit-Queue: Koki Ryu <kokiryu@chromium.org>
Reviewed-by: Suleiman Souhlal <suleiman@chromium.org>
Tested-by: Koki Ryu <kokiryu@chromium.org>
Signed-off-by: Richard Fung <richardfung@google.com>