ADT: Remove the unused explicit `OptionalTest` fixture, NFC
authorDuncan P. N. Exon Smith <dexonsmith@apple.com>
Fri, 4 Dec 2020 19:27:02 +0000 (11:27 -0800)
committerDuncan P. N. Exon Smith <dexonsmith@apple.com>
Tue, 8 Dec 2020 23:25:03 +0000 (15:25 -0800)
commite8021f34e1bae8537aba3c834ff0a9a73ad93405
tree07e8ca0d1b2909b8507934f84aa77212371c3422
parentf0e89e69d6d7f4a097f4e1b1b9e38fe6cc384b7e
ADT: Remove the unused explicit `OptionalTest` fixture, NFC

`OptionalTest` was empty; drop it and switch all the tests to use the
shorter `TEST` instead of `TEST_F`.

Differential Revision: https://reviews.llvm.org/D92675
llvm/unittests/ADT/OptionalTest.cpp