[mutter] gpu: Drop unused declaration

[Jonas Ådahl <jadahl src gnome org>]

commit c585b214b8026f3a06de2a43738e3d53baaf2ae4
Author: Emilio Pozuelo Monfort <emilio pozuelo collabora co uk>
Date:   Thu Oct 11 14:02:36 2018 +0200

    gpu: Drop unused declaration

 src/backends/meta-gpu.h | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/src/backends/meta-gpu.h b/src/backends/meta-gpu.h
index 4badcbd26..358f2ee36 100644
--- a/src/backends/meta-gpu.h
+++ b/src/backends/meta-gpu.h
@@ -37,8 +37,6 @@ struct _MetaGpuClass
                              GError  **error);
 };
 
-int meta_gpu_get_kms_fd (MetaGpu *gpu);
-
 const char * meta_gpu_get_kms_file_path (MetaGpu *gpu);
 
 gboolean meta_gpu_read_current (MetaGpu  *gpu,