Remove unused and obsolete Tab -currentRedirectedURLs method.

ios/chrome/browser/tabs/tab.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef IOS_CHROME_BROWSER_TABS_TAB_H_
 #define IOS_CHROME_BROWSER_TABS_TAB_H_
 
 #import <UIKit/UIKit.h>
 
 #include <memory>
@@ skipping 256 matching lines @@
 
 // Returns the timestamp of the last time the tab is visited.
 - (double)lastVisitedTimestamp;
 
 // Updates the timestamp of the last time the tab is visited.
 - (void)updateLastVisitedTimestamp;
 
 // Returns the infobars::InfoBarManager object for this tab.
 - (infobars::InfoBarManager*)infoBarManager;
 
-// Returns the URLs in the entries that are redirected to the current entry.
-- (std::vector<GURL>)currentRedirectedUrls;
-
 // Whether the content of the current tab is compatible with reader mode.
 - (BOOL)canSwitchToReaderMode;
 
 // Asks the tab to enter into reader mode, presenting a streamlined view of the
 // current content.
 - (void)switchToReaderMode;
 
 // Update internal state to use the desktop user agent. Must call
 // -reloadWebViewAndURL for changes to take effect.
 - (void)enableDesktopUserAgent;
@@ skipping 57 matching lines @@
 
 // Called when this tab is hidden.
 - (void)wasHidden;
 
 // Evaluates U2F result.
 - (void)evaluateU2FResultFromURL:(const GURL&)url;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_TABS_TAB_H_