[calls] Remove unused typedef

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit f985332a37fca43e58e32da3ccfd6f953ae00ffe
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Fri Oct 1 18:35:03 2021 +0200

    Remove unused typedef

 src/calls-call-selector-item.h | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/src/calls-call-selector-item.h b/src/calls-call-selector-item.h
index 219bbb22..1a5ad350 100644
--- a/src/calls-call-selector-item.h
+++ b/src/calls-call-selector-item.h
@@ -29,8 +29,6 @@
 
 #include <gtk/gtk.h>
 
-typedef struct _CallsCallHolder CallsCallHolder;
-
 G_BEGIN_DECLS
 
 #define CALLS_TYPE_CALL_SELECTOR_ITEM (calls_call_selector_item_get_type ())