Revert "mako defconfig:  CONFIG_DEBUG_SLAB_LEAK=y"

This reverts commit 68b6491433b10b1b71b6f3748be5081bf72632f1.
Revert "mako defconfig:  use SLAB allocator instead of SLUB"

This reverts commit 7a2bb83dfa61c2226dbbcd522514f31a200c31e5.