ChromeOS: removed outdated --disable-timezone-tracking-option switch.

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index 6dda959e44aee5287f11df1d2f92e38d4f69598d..27e2c3a1c7858578df896102671b5956f8bcbbca 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -203,10 +203,6 @@ const char kDisableStorageManager[] = "disable-storage-manager";
 const char kDisableSystemTimezoneAutomaticDetectionPolicy[] =
     "disable-system-timezone-automatic-detection";
 
-// Disables automatic timezone update.
-const char kDisableTimeZoneTrackingOption[] =
-    "disable-timezone-tracking-option";
-
 // Disables volume adjust sound.
 const char kDisableVolumeAdjustSound[] = "disable-volume-adjust-sound";