application: Drop libcallaudio initialization

libcallaudio bits live in libcall-ui for a long time
(and libcallaudio is going away anyway).

Signed-off-by: Evangelos Ribeiro Tzaras <devrtz@fortysixandtwo.eu>
Part-of: <https://gitlab.gnome.org/GNOME/calls/-/merge_requests/806>

src/calls-application.c

@@ -48,7 +48,6 @@
 #include <call-ui.h>
 #include <glib/gi18n.h>
 #include <glib-unix.h>
-#include <libcallaudio.h>
 
 /**
  * SECTION: calls-application
@@ -474,9 +473,6 @@ startup (GApplication *application)
 
   g_print ("Calls %s starting up...\n", VCS_TAG);
 
-  if (!call_audio_init (&error))
-    g_warning ("Failed to init libcallaudio: %s", error->message);
-
   cui_init (TRUE);
 
   if (!g_get_prgname ())