clean up message "External extension with id xxxx has been uninstalled by ..."

extensions/browser/extension_prefs.cc

Index: extensions/browser/extension_prefs.cc
diff --git a/extensions/browser/extension_prefs.cc b/extensions/browser/extension_prefs.cc
index 56645a72564cfaf2ff64c922cec00eb1f5edd514..cc18c53751f1505be9aa562220bb3e13e7845b0e 100644
--- a/extensions/browser/extension_prefs.cc
+++ b/extensions/browser/extension_prefs.cc
@@ -1259,8 +1259,6 @@ std::unique_ptr<ExtensionInfo> ExtensionPrefs::GetInstalledExtensionInfo(
   int state_value;
   if (ext->GetInteger(kPrefState, &state_value) &&
       state_value == Extension::EXTERNAL_EXTENSION_UNINSTALLED) {
-    LOG(WARNING) << "External extension with id " << extension_id
-                 << " has been uninstalled by the user";
     return std::unique_ptr<ExtensionInfo>();
   }