Remove old mojo type leftovers from WaylandBufferManagerGpu

Some unused references to old mojo types remained in the
implementation of WaylandBufferManagerGpu from
wayland_buffer_manager.mojom. Just removed them.

Bug: 955171
Change-Id: I95afae400d0fbb37e81946bf557780815346b13d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1849377
Commit-Queue: Maksim Sisov <msisov@igalia.com>
Reviewed-by: Maksim Sisov <msisov@igalia.com>
Cr-Commit-Position: refs/heads/master@{#705514}

ui/ozone/platform/wayland/gpu/wayland_buffer_manager_gpu.cc

@@ -9,7 +9,6 @@
 #include "base/bind.h"
 #include "base/message_loop/message_loop_current.h"
 #include "base/process/process.h"
-#include "mojo/public/cpp/bindings/associated_interface_ptr.h"
 #include "mojo/public/cpp/system/platform_handle.h"
 #include "ui/ozone/common/linux/drm_util_linux.h"
 #include "ui/ozone/platform/wayland/gpu/wayland_surface_gpu.h"

ui/ozone/platform/wayland/gpu/wayland_buffer_manager_gpu.h

@@ -40,8 +40,6 @@ class WaylandWindow;
 // sequence.
 class WaylandBufferManagerGpu : public ozone::mojom::WaylandBufferManagerGpu {
  public:
-  using BufferManagerHostPtr = ozone::mojom::WaylandBufferManagerHostPtr;
-
   WaylandBufferManagerGpu();
   ~WaylandBufferManagerGpu() override;