Revert "[PATCH 2/2] zram: reduce metadata overhead"

This reverts commit 5bbb5da8da8e91076e8875326e93b82d93271885.
Revert "[PATCH 1/2] zsmalloc: add function to query object size"

This reverts commit 878fc1d3e4cbad95a0f9042ca5274c730e43f1cb.
Mpokang kernel v6