[calls] manager: Remove unused include

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit 4348e794a93058ca2830035b24aca1d412599fbf
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Thu Sep 15 19:22:41 2022 +0200

    manager: Remove unused include

 src/calls-manager.c | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/calls-manager.c b/src/calls-manager.c
index a80b349e..636f1664 100644
--- a/src/calls-manager.c
+++ b/src/calls-manager.c
@@ -28,7 +28,6 @@
 #include "config.h"
 
 #include "calls-account.h"
-#include "calls-application.h"
 #include "calls-contacts-provider.h"
 #include "calls-manager.h"
 #include "calls-message-source.h"