[cleanup] Removed embedded sign-in support code from OOBE.

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index 31b01dfed0a3d97680ddb1b080151eb375da23c7..ffb83b990e6b418eb8cdda76a61ea5a904cb812a 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -112,10 +112,6 @@ const char kEnableConsumerManagement[] = "enable-consumer-management";
 // If this switch is set, the device cannot be remotely disabled by its owner.
 const char kDisableDeviceDisabling[] = "disable-device-disabling";
 
-// If this switch is set, Chrome OS login screen uses |EmbeddedSignin| endpoint
-// of GAIA.
-const char kEnableEmbeddedSignin[] = "enable-embedded-signin";
-
 // If this switch is set, the new Korean IME will be available in
 // chrome://settings/languages.
 const char kEnableNewKoreanIme[] = "enable-new-korean-ime";