Revert "+ update "BFQ-v6-I-O-sched" (for-3.4) -> http://algo.ing.unimo.it/people/paolo/disk_sched/"

This reverts commit fca63d66da0846384aa27d49f80557d4ce48d5f8.
Revert "+ "block, bfq: attempt to fix use-after-free which affects SLUB behavior (3.3.0 to 3.8.0)" - https://github.com/damentz/zen-kernel/commit/975bb74bfcf1c022ea49198dcd74efe14fe58d34"

This reverts commit de610d521188cadc71a3826113eaaaf9be234b6a.
Revert "FIX BFQ I/O sched after update. by voku."

This reverts commit ed0511eeea91c8656e5dbda504cf686567f505fb.