No need to manually reset MWTimestamp fake time,
MediaWikiTestCaseTrait::fakeTimestampTearDown() does
that after all tests anyway.
Change-Id: Ie45e837c693d7f21b6c7e25471cdaad6f60a3de9
This is micro-optimization of closure code to avoid binding the closure
to $this where it is not needed.
Created by I25a17fb22b6b669e817317a0f45051ae9c608208
Change-Id: I0ffc6200f6c6693d78a3151cb8cea7dce7c21653