Remove the iOS QR Code scanner experiment code.

ios/chrome/app/application_delegate/user_activity_handler_unittest.mm

Index: ios/chrome/app/application_delegate/user_activity_handler_unittest.mm
diff --git a/ios/chrome/app/application_delegate/user_activity_handler_unittest.mm b/ios/chrome/app/application_delegate/user_activity_handler_unittest.mm
index da1fc34bce9c28d69ba6e7b2c29166c8940f5ebb..d1125e122751442b4592e584d7fe1ffa39ad59ec 100644
--- a/ios/chrome/app/application_delegate/user_activity_handler_unittest.mm
+++ b/ios/chrome/app/application_delegate/user_activity_handler_unittest.mm
@@ -416,11 +416,9 @@ TEST_F(UserActivityHandlerTest, continueUserActivityShortcutActions) {
     ]
   ];
 
-  // Enable the QR Scanner and Spotlight Actions experiments.
+  // Enable the Spotlight Actions experiment.
   base::test::ScopedCommandLine scoped_command_line;
   scoped_command_line.GetProcessCommandLine()->AppendSwitch(
-      switches::kEnableQRScanner);
-  scoped_command_line.GetProcessCommandLine()->AppendSwitch(
       switches::kEnableSpotlightActions);
 
   for (id parameters in parametersToTest) {
@@ -550,11 +548,6 @@ TEST_F(UserActivityHandlerTest, performActionForShortcutItemWithRealShortcut) {
     @[ @"OpenQRScanner", @NO, @NO, @YES ]
   ];
 
-  // Enable the QR Scanner experiment.
-  base::test::ScopedCommandLine scoped_command_line;
-  scoped_command_line.GetProcessCommandLine()->AppendSwitch(
-      switches::kEnableQRScanner);
-
   swizzleHandleStartupParameters();
 
   for (id parameters in parametersToTest) {