Remove an outdated TODO

ash/common/system/chromeos/network/network_list_md.cc

Index: ash/common/system/chromeos/network/network_list_md.cc
diff --git a/ash/common/system/chromeos/network/network_list_md.cc b/ash/common/system/chromeos/network/network_list_md.cc
index ae2e80d16826ecb3baadca6ee45c51818e1f6cd2..b972cd4fe84b991f67109832b7bd846facbbe4f3 100644
--- a/ash/common/system/chromeos/network/network_list_md.cc
+++ b/ash/common/system/chromeos/network/network_list_md.cc
@@ -129,9 +129,6 @@ class NetworkListView::SectionHeaderRowView : public views::View,
 
  private:
   void InitializeLayout() {
-    // TODO(mohsen): Consider using TriView class and adding a utility function
-    // to TrayPopupUtils to simplify creation of the following layout. See
-    // https://crbug.com/614453.
     TrayPopupUtils::ConfigureAsStickyHeader(this);
     SetLayoutManager(new views::FillLayout);
     container_ = TrayPopupUtils::CreateSubHeaderRowView();