[gnome-todo] timeline: Remove unused struct

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 86fd68bb2e3c0869b9d6875fcd3f5b6cecc44f98
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sat Mar 6 21:29:32 2021 -0300

    timeline: Remove unused struct
    
    Markers were removed a while ago.

 src/animation/gtd-timeline.c | 13 -------------
 1 file changed, 13 deletions(-)
---
diff --git a/src/animation/gtd-timeline.c b/src/animation/gtd-timeline.c
index 1fdf5a89..371c1551 100644
--- a/src/animation/gtd-timeline.c
+++ b/src/animation/gtd-timeline.c
@@ -128,19 +128,6 @@ typedef struct
   guint auto_reverse       : 1;
 } GtdTimelinePrivate;
 
-typedef struct
-{
-  gchar *name;
-  GQuark quark;
-
-  union {
-    guint msecs;
-    gdouble progress;
-  } data;
-
-  guint is_relative : 1;
-} TimelineMarker;
-
 enum
 {
   PROP_0,