Revert "net/sched: fix false lockdep warning on qdisc root lock"

This reverts commit 048b3381 which is
commit af0cb3fa upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I1a0434ee7eb3b2ff625e5eba9a7d9547452f0bb3
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>