[calls] provider: Remove unused parameter from docstring

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit 4dd4ba3be3903c9b6d84f3d8f78394fe51775572
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Thu Jan 20 09:08:36 2022 +0100

    provider: Remove unused parameter from docstring

 src/calls-provider.c | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/calls-provider.c b/src/calls-provider.c
index f58383a5..bac5a5c1 100644
--- a/src/calls-provider.c
+++ b/src/calls-provider.c
@@ -174,7 +174,6 @@ calls_provider_get_status (CallsProvider *self)
 /**
  * calls_provider_get_origins:
  * @self: a #CallsProvider
- * @error: a #GError, or #NULL
  *
  * Get the list of #CallsOrigin interfaces offered by this provider.
  *