Remove DatabaseUpdater::ifNoActorTable

It has been deprecated since 1.35 and it is unused.

Change-Id: Ic3ddfa4043e580c368846811dab523ca9de7d63e

RELEASE-NOTES-1.39

@@ -264,6 +264,8 @@ because of Phabricator reports.
 * ChangesListSpecialPage::checkStructuredFilterUiEnabled() and
   SpecialWatchlist::checkStructuredFilterUiEnabled() now support UserIdentity
   as the only argument. Passing Config argument was deprecated in 1.34.
+* DatabaseUpdater::ifNoActorTable(), deprecated in 1.35, has been removed. Use
+  ::ifTableNotExists() instead.
 * …
 
 === Deprecations in 1.39 ===

includes/installer/DatabaseUpdater.php

@@ -1335,14 +1335,6 @@ abstract class DatabaseUpdater {
 		}
 	}
 
-	/**
-	 * @deprecated since 1.35, use ifTableNotExists() instead
-	 */
-	protected function ifNoActorTable( $func, ...$params ) {
-		wfDeprecated( __METHOD__, '1.35' );
-		return $this->ifTableNotExists( 'actor', $func, ...$params );
-	}
-
 	/**
 	 * Only run a function if a table does not exist
 	 *