Remove WebRequest::checkSessionCookie() method as being deprecated

Bug: T61113
Change-Id: I5285dbfc47d6429e16b7e7839bf55d48320d0bf0

RELEASE-NOTES-1.29

@@ -147,6 +147,8 @@ changes to languages because of Phabricator reports.
 * User::getTemporaryPassword() (deprecated in 1.27) was removed.
 * User::isPasswordReminderThrottled() (deprecated in 1.27) was removed.
 * FSRepo (deprecated in 1.19) was removed.
+* WebRequest::checkSessionCookie() (deprecated in 1.27) was removed. Use
+\MediaWiki\Session\SessionManager::singleton()->getPersistedSessionId() instead.
 
 == Compatibility ==
 

includes/DerivativeRequest.php

@@ -49,10 +49,6 @@ class DerivativeRequest extends FauxRequest {
 		return $this->base->getCookie( $key, $prefix, $default );
 	}
 
-	public function checkSessionCookie() {
-		return $this->base->checkSessionCookie();
-	}
-
 	public function getHeader( $name, $flags = 0 ) {
 		return $this->base->getHeader( $name, $flags );
 	}

includes/WebRequest.php

@@ -757,22 +757,6 @@ class WebRequest {
 		return $this->sessionId;
 	}
 
-	/**
-	 * Returns true if the request has a persistent session.
-	 * This does not necessarily mean that the user is logged in!
-	 *
-	 * @deprecated since 1.27, use
-	 *  \MediaWiki\Session\SessionManager::singleton()->getPersistedSessionId()
-	 *  instead.
-	 * @return bool
-	 */
-	public function checkSessionCookie() {
-		global $wgInitialSessionId;
-		wfDeprecated( __METHOD__, '1.27' );
-		return $wgInitialSessionId !== null &&
-			$this->getSession()->getId() === (string)$wgInitialSessionId;
-	}
-
 	/**
 	 * Get a cookie from the $_COOKIE jar
 	 *