Check if observers are removed

[llvmbot]

Bugzilla Link	3956
Version	unspecified
OS	MacOS X
Reporter	LLVM Bugzilla Contributor

Extended Description

HI,

A nice addition to the static analyzer would be to have it check for observers (KVO and NSNotificationCenter) not being removed. It seems like something that's right up its ally since it's a memory issue with making sure you have matching pairs. The dangling pointers that it can create are not good to have around.

Thanks

[llvmbot]

assigned to @tkremenek