[mutter] monitor-manager/kms: Remove left-over struct

[Marge Bot <marge-bot src gnome org>]

commit 11fee3f7536e0d6b38f0fd2e9efde379f1854172
Author: Jonas Ådahl <jadahl gmail com>
Date:   Thu Dec 17 21:28:43 2020 +0100

    monitor-manager/kms: Remove left-over struct
    
    From the time it dealt with reading DRM file descriptors.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1689>

 src/backends/native/meta-monitor-manager-kms.c | 8 --------
 1 file changed, 8 deletions(-)
---
diff --git a/src/backends/native/meta-monitor-manager-kms.c b/src/backends/native/meta-monitor-manager-kms.c
index 5ad8bf591f..3d2037c952 100644
--- a/src/backends/native/meta-monitor-manager-kms.c
+++ b/src/backends/native/meta-monitor-manager-kms.c
@@ -63,14 +63,6 @@
 #include "meta/main.h"
 #include "meta/meta-x11-errors.h"
 
-typedef struct
-{
-  GSource source;
-
-  gpointer fd_tag;
-  MetaMonitorManagerKms *manager_kms;
-} MetaKmsSource;
-
 struct _MetaMonitorManagerKms
 {
   MetaMonitorManager parent_instance;