[gnome-builder/wip/gtk4-port] libide/gui: remove unused property

[Christian Hergert <chergert src gnome org>]

commit 78323307936bda1553ad52a5036542d8e52f932b
Author: Christian Hergert <chergert redhat com>
Date:   Tue Mar 29 13:42:00 2022 -0700

    libide/gui: remove unused property
    
    We don't have surfaces anymore.

 src/libide/gui/ide-workspace.c | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/libide/gui/ide-workspace.c b/src/libide/gui/ide-workspace.c
index a57928d9b..f2955237a 100644
--- a/src/libide/gui/ide-workspace.c
+++ b/src/libide/gui/ide-workspace.c
@@ -73,7 +73,6 @@ typedef struct
 enum {
   PROP_0,
   PROP_CONTEXT,
-  PROP_VISIBLE_SURFACE,
   N_PROPS
 };