[calls] call: Remove unused calls_call_state_to_string()

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit b9e49986f07499d97ea7e5475e9cfec0d9e24ad3
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Mon Jan 31 16:59:48 2022 +0100

    call: Remove unused calls_call_state_to_string()
    
    We're now using cui_call_state_to_string(), so this is unused.

 src/calls-call.c | 21 ---------------------
 src/calls-call.h |  2 --
 2 files changed, 23 deletions(-)
---
diff --git a/src/calls-call.c b/src/calls-call.c
index c127a391..575e2925 100644
--- a/src/calls-call.c
+++ b/src/calls-call.c
@@ -573,27 +573,6 @@ calls_call_get_silenced (CallsCall *self)
   return priv->silenced;
 }
 
-void
-calls_call_state_to_string (GString        *string,
-                            CallsCallState  state)
-{
-  GEnumClass *klass;
-  GEnumValue *value;
-
-  klass = g_type_class_ref (CALLS_TYPE_CALL_STATE);
-
-  value = g_enum_get_value (klass, (gint)state);
-  if (!value)
-    return g_string_printf (string,
-                            "Unknown call state (%d)",
-                            (gint)state);
-
-  g_string_assign (string, value->value_nick);
-  string->str[0] = g_ascii_toupper (string->str[0]);
-
-  g_type_class_unref (klass);
-}
-
 gboolean
 calls_call_state_parse_nick (CallsCallState *state,
                              const char     *nick)
diff --git a/src/calls-call.h b/src/calls-call.h
index 8ab9f15e..d70a2ab5 100644
--- a/src/calls-call.h
+++ b/src/calls-call.h
@@ -78,8 +78,6 @@ CallsBestMatch  *calls_call_get_contact            (CallsCall     *self);
 void             calls_call_silence_ring           (CallsCall     *self);
 gboolean         calls_call_get_silenced           (CallsCall     *self);
 
-void     calls_call_state_to_string  (GString         *string,
-                                      CallsCallState   state);
 gboolean calls_call_state_parse_nick (CallsCallState  *state,
                                       const char      *nick);