Remove MaterialDesignController::IsModeMaterial

ui/base/material_design/material_design_controller.h

Index: ui/base/material_design/material_design_controller.h
diff --git a/ui/base/material_design/material_design_controller.h b/ui/base/material_design/material_design_controller.h
index c58b2fc630b3c98cfe2718f86956e59318f65060..6fdffbb9ab0a571717550028cde5fc616ef9b637 100644
--- a/ui/base/material_design/material_design_controller.h
+++ b/ui/base/material_design/material_design_controller.h
@@ -32,9 +32,6 @@ class UI_BASE_EXPORT MaterialDesignController {
   // Get the current Mode that should be used by the system.
   static Mode GetMode();
 
-  // Returns true. TODO(estade): remove.
-  static bool IsModeMaterial();
-
   // Returns true if the current mode is a material design variant and this mode
   // should be extended to cover secondary UI.
   static bool IsSecondaryUiMaterial();