Per Timo, this avoids us having pointless code that is never
executed, and the replacement notification to the user (that
ve.blah.UnicornAnnotation.foo is null and not a method) is
sufficiently clear that the issue lies in the lack of existence
of the ve.blah.UnicornAnnotation#foo method.
Only ones in this repo appear to be in ve.init.mw.ApiResponseCache.
Bug: T54482
Change-Id: If44b8d63b8e7b2a5c289fe7278ad54e722b185fa