[gtk] inspector: Avoid critical warnings

[Matthias Clasen <matthiasc src gnome org>]

commit 92ab45098381eb828f65c6391fe51f96c5a37f14
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Dec 7 19:39:02 2019 -0500

    inspector: Avoid critical warnings
    
    We were still using this but it's not defined in the UI xml.
    
    Fixes: https://gitlab.gnome.org/GNOME/gtk/issues/2295

 gtk/inspector/logs.c | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/gtk/inspector/logs.c b/gtk/inspector/logs.c
index a83d32b671..ab24213762 100644
--- a/gtk/inspector/logs.c
+++ b/gtk/inspector/logs.c
@@ -62,7 +62,6 @@ struct _GtkInspectorLogsPrivate
   GtkWidget *vulkan_gsk;
   GtkWidget *shaders;
   GtkWidget *surface;
-  GtkWidget *fallback;
   GtkWidget *glyphcache;
 
   GtkWidget *actions;
@@ -134,7 +133,6 @@ flag_toggled (GtkWidget        *button,
   update_flag (logs->priv->vulkan_gsk, &flags, GSK_DEBUG_VULKAN);
   update_flag (logs->priv->shaders, &flags, GSK_DEBUG_SHADERS);
   update_flag (logs->priv->surface, &flags, GSK_DEBUG_SURFACE);
-  update_flag (logs->priv->fallback, &flags, GSK_DEBUG_FALLBACK);
   update_flag (logs->priv->glyphcache, &flags, GSK_DEBUG_GLYPH_CACHE);
   gsk_set_debug_flags (flags);