Hard deprecate Revision::getNext

Unused in deployed code, see codesearch:
https://codesearch.wmflabs.org/deployed/?q=-%3EgetNext%5C(%5C)&i=nope&files=%5C.php%24&repos=

Bug: T246284
Change-Id: Ic216093500418526029dde3a8ae4314b35361b13

RELEASE-NOTES-1.35

@@ -788,6 +788,7 @@ because of Phabricator reports.
   - ::getRecentChange - use RevisionStore::getRecentChange instead
   - ::getTextId - use SlotRecord::getContentAddress for retrieving an actual
       content address, or RevisionRecord::hasSameContent to compare content
+  - ::getNext - use RevisionLookup::getNextRevision instead
 * The Revision method had a few methods that were previously protected and
   have been made private. They were:
   - ::getRevisionStore

includes/Revision.php

@@ -861,9 +861,12 @@ class Revision implements IDBAccessObject {
 	/**
 	 * Get next revision for this title
 	 *
+	 * @deprecated since 1.31 (soft), 1.35 (hard), use RevisionLookup::getNextRevision instead
+	 *
 	 * @return Revision|null
 	 */
 	public function getNext() {
+		wfDeprecated( __METHOD__, '1.31' );
 		$rec = self::getRevisionLookup()->getNextRevision( $this->mRecord );
 		return $rec ? new Revision( $rec, self::READ_NORMAL, $this->getTitle() ) : null;
 	}

tests/phpunit/includes/RevisionDbTest.php

@@ -687,6 +687,7 @@ class RevisionDbTest extends MediaWikiIntegrationTestCase {
 	 * @covers Revision::getNext
 	 */
 	public function testGetNext() {
+		$this->hideDeprecated( 'Revision::getNext' );
 		$this->hideDeprecated( 'WikiPage::getRevision' );
 
 		$rev1 = $this->testPage->getRevision();