Revert of CHECK that the RendererCompositorFrameSink has been detached

content/renderer/gpu/renderer_compositor_frame_sink.h

Index: content/renderer/gpu/renderer_compositor_frame_sink.h
diff --git a/content/renderer/gpu/renderer_compositor_frame_sink.h b/content/renderer/gpu/renderer_compositor_frame_sink.h
index f57dbeb2ea03c9e9a18ebaee7c1d8d947d7673be..f30c667a32ebc56b88ebe0e8d695d64fdeb20d9d 100644
--- a/content/renderer/gpu/renderer_compositor_frame_sink.h
+++ b/content/renderer/gpu/renderer_compositor_frame_sink.h
@@ -142,8 +142,6 @@ class RendererCompositorFrameSink
   cc::mojom::MojoCompositorFrameSinkPtrInfo sink_ptr_info_;
   cc::mojom::MojoCompositorFrameSinkClientRequest sink_client_request_;
   mojo::Binding<cc::mojom::MojoCompositorFrameSinkClient> sink_client_binding_;
-
-  bool bound_ = false;
 };
 
 }  // namespace content