Revert "Add Knock off and on gesture control"

We have an option to enable knock-off in statusbar mods,
and turning off knock, who does that?
This gives a duplicate option, I think it can be removed
This reverts commit d144191a5ab0233b6486edb396a778747866ca36.

Change-Id: Ie78bef18bb13bf9aedd7e243db7b2fc557f26a6a