Why:
- Various tests have been calling Title::clearCaches() on an ad-hoc
basis at the end of test methods, or in tearDown(), to work around
stale Title instances persisting across tests in Title's internal
caches.
- MediaWikiIntegrationTestCase takes care of this since
Ie6cac7e1282f794277dfc8ff3673f12e9969818c, making these calls
unnecessary.
What:
- Remove now-redundant Title::clearCaches() calls from tearDown()
overrides and the end of test methods.
- Preserve in-test Title::clearCaches() calls that are likely
intended to force internal caches to reflect changes happening
within the test itself.
Bug: T395214
Change-Id: Ib5d42389cef20f3839c7f7a80041d002f0f09449
(cherry picked from commit 6483181044496c339ad497cc885319b20de7f6e7)
8e14ff1bc0