Revert "defconfigs: regenerate and enable f2fs"

This reverts commit fc5d56baf3740d561d9c87043bc0437111ba32bb.
Revert "f2fs: import and backport"

This reverts commit 0755c24ac079d04f45dd006558c0267dc055c0df.
Merge branch '3.0.101' into kk_mr2

Change-Id: I44e7b91b5e0773a32b22b1cd39fc8c76e36dd73b