chromeos: Remove UpdateLibrary code, which is no longer used.

chrome/browser/chromeos/cros/cros_library.cc

Index: chrome/browser/chromeos/cros/cros_library.cc
diff --git a/chrome/browser/chromeos/cros/cros_library.cc b/chrome/browser/chromeos/cros/cros_library.cc
index f1848713f8a32f445db7529c3f3105cd8a816275..50bbf21566b36e15f9fda215a5672722d8b246e0 100644
--- a/chrome/browser/chromeos/cros/cros_library.cc
+++ b/chrome/browser/chromeos/cros/cros_library.cc
@@ -11,7 +11,6 @@
 #include "chrome/browser/chromeos/cros/network_library.h"
 #include "chrome/browser/chromeos/cros/power_library.h"
 #include "chrome/browser/chromeos/cros/screen_lock_library.h"
-#include "chrome/browser/chromeos/cros/update_library.h"
 #include "third_party/cros/chromeos_cros_api.h"
 
 // Pass !libcros_loaded_ to GetDefaultImpl instead of use_stub_impl_ so that
@@ -84,7 +83,6 @@ DEFINE_GET_LIBRARY_METHOD(Cryptohome, crypto);
 DEFINE_GET_LIBRARY_METHOD(Network, network);
 DEFINE_GET_LIBRARY_METHOD(Power, power);
 DEFINE_GET_LIBRARY_METHOD(ScreenLock, screen_lock);
-DEFINE_GET_LIBRARY_METHOD(Update, update);
 
 bool CrosLibrary::LoadLibcros() {
   if (!libcros_loaded_ && !load_error_) {
@@ -129,6 +127,5 @@ DEFINE_SET_LIBRARY_METHOD(Cryptohome, crypto);
 DEFINE_SET_LIBRARY_METHOD(Network, network);
 DEFINE_SET_LIBRARY_METHOD(Power, power);
 DEFINE_SET_LIBRARY_METHOD(ScreenLock, screen_lock);
-DEFINE_SET_LIBRARY_METHOD(Update, update);
 
 } // namespace chromeos