drbd: remove call to memset before free device/resource/connection

drbd: remove call to memset before free device/resource/connection

[ Upstream commit 005498e3ee0ae6b817002fbb10fd30f6dfb6e530 ]

This revert 146dec340e91 ("drbd: poison free'd device, resource and
connection structs"), add memset is odd here for debugging, there are
some methods to accurately show what happened, such as kdump.

Signed-off-by: Wang ShaoBo <bobo.shaobowang@huawei.com>
Link: https://lore.kernel.org/r/20221124015817.2729789-2-bobo.shaobowang@huawei.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Stable-dep-of: 286e807a5bcc ("drbd: destroy workqueue when drbd device was freed")
Signed-off-by: Sasha Levin <sashal@kernel.org>