Remove --disable-drive flag and flags section in drive-internals.

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index 619d14b2e1ae07599ec1448fec8056fe0c6368be..c04e9e19e93ae226d271171b1039d313bbe4e4b3 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -33,9 +33,6 @@ const char kDerelictIdleTimeout[] = "derelict-idle-timeout";
 // Disables wallpaper boot animation (except of OOBE case).
 const char kDisableBootAnimation[]          = "disable-boot-animation";
 
-// Disables Google Drive integration.
-const char kDisableDrive[]                  = "disable-drive";
-
 // Disables reporting recently logged in users for enterprise-managed devices.
 const char kDisableEnterpriseUserReporting[] =
     "disable-enterprise-user-reporting";