Revert "Adding ROW (Read-over-Write) IO Scheduler (needs testing)"

This reverts commit 5a827fd1dae55a083ce752c8952a1c1d90d507a2.
Revert "4.0a wip"

This reverts commit 25c09f4c073c205afcfc0e21123fb6051f8d86b5.
Revert "sd partitioning code, initial relocation to sd-ext work"

This reverts commit f518ee1c6efd5f13430f75a50928c3c658eb6a8c.