Remove Title::isNamespaceProtected

It has been deprecated since 1.34 and it is unused.

Change-Id: I3f375a8d3aceb3e31c27532c28b190c41e628edf

RELEASE-NOTES-1.39

@@ -251,6 +251,7 @@ because of Phabricator reports.
 	- mediawiki.legacy.commonPrint
 * LogFormatter::styleRestricedElement(), deprecated since 1.37, has been
   removed. Use ::styleRestrictedElement() instead.
+* Title::isNamespaceProtected(), deprecated in 1.34, has been removed.
 * …
 
 === Deprecations in 1.39 ===

includes/Title.php

@@ -2488,30 +2488,6 @@ class Title implements LinkTarget, PageIdentity, IDBAccessObject {
 		);
 	}
 
-	/**
-	 * Determines if $user is unable to edit this page because it has been protected
-	 * by $wgNamespaceProtection.
-	 *
-	 * @deprecated since 1.34, hard-deprecated since 1.37
-	 * @param User $user User object to check permissions
-	 * @return bool
-	 */
-	public function isNamespaceProtected( User $user ) {
-		global $wgNamespaceProtection;
-
-		wfDeprecated( __METHOD__, '1.34' );
-
-		if ( isset( $wgNamespaceProtection[$this->mNamespace] ) ) {
-			$permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
-			foreach ( (array)$wgNamespaceProtection[$this->mNamespace] as $right ) {
-				if ( !$permissionManager->userHasRight( $user, $right ) ) {
-					return true;
-				}
-			}
-		}
-		return false;
-	}
-
 	/**
 	 * Cascading protection: Return true if cascading restrictions apply to this page, false if not.
 	 *

tests/phpunit/includes/TitleTest.php

@@ -2108,28 +2108,6 @@ class TitleTest extends MediaWikiIntegrationTestCase {
 		$this->assertFalse( $title->isProtected( 'edit' ) );
 	}
 
-	/**
-	 * @covers Title::isNamespaceProtected
-	 */
-	public function testIsNamespaceProtected() {
-		$this->hideDeprecated( 'Title::isNamespaceProtected' );
-		$title = $this->getExistingTestPage( 'UTest1' )->getTitle();
-		$this->setMwGlobals( [
-			'wgNamespaceProtection' => []
-		] );
-		$this->assertFalse(
-			$title->isNamespaceProtected( $this->getTestUser()->getUser() )
-		);
-		$this->setMwGlobals( [
-			'wgNamespaceProtection' => [
-				NS_MAIN => [ 'edit-main' ]
-			]
-		] );
-		$this->assertTrue(
-			$title->isNamespaceProtected( $this->getTestUser()->getUser() )
-		);
-	}
-
 	/**
 	 * @covers Title::isCascadeProtected
 	 */