Move code to remove attach points and events to separate method, so it can be called independently of destroyRendering(), fixes #16889 !strict.
Move code to remove attach points and events to separate method, so it can be called independently of destroyRendering(), fixes #16889 !strict.

Also removing redundant call to this.own(), from [30465], refs #16585.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@30934 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful