[ios] Remove IDC_SHOW_TOOLS_MENU

ios/chrome/browser/ui/tab_switcher/tab_switcher_controller.mm

Index: ios/chrome/browser/ui/tab_switcher/tab_switcher_controller.mm
diff --git a/ios/chrome/browser/ui/tab_switcher/tab_switcher_controller.mm b/ios/chrome/browser/ui/tab_switcher/tab_switcher_controller.mm
index 9e2ac2e12c0105e0f00fc714fe60dd725d8fbf0b..05a109d9896538a7e69f8b10d1ce1a6c5dcfd76f 100644
--- a/ios/chrome/browser/ui/tab_switcher/tab_switcher_controller.mm
+++ b/ios/chrome/browser/ui/tab_switcher/tab_switcher_controller.mm
@@ -374,6 +374,12 @@ enum class SnapshotViewOption {
   return _delegate;
 }
 
+- (id<BrowserCommands>)browserCommandsDispatcher {
+  // TODO(crbug.com/738881) add a dispatcher instance to this class and
+  // return it here when needed.
+  return nil;
+}
+
 - (IBAction)chromeExecuteCommand:(id)sender {
   int command = [sender tag];