application: Remove gcal_application_get_manager()

GcalManager is handled by GcalContext now, and as such, there's
no need to expose this wrapper around it anymore.

src/gcal-application.c

@@ -691,22 +691,6 @@ gcal_application_get_context (GcalApplication *self)
   return self->context;
 }
 
-/**
- * gcal_application_get_manager:
- * @self: a #GcalApplication
- *
- * Retrieves the #GcalManager of the application.
- *
- * Returns: (transfer none): a #GcalManager
- */
-GcalManager*
-gcal_application_get_manager (GcalApplication *self)
-{
-  g_return_val_if_fail (GCAL_IS_APPLICATION (self), NULL);
-
-  return gcal_context_get_manager (self->context);
-}
-
 void
 gcal_application_set_uuid (GcalApplication *self,
                            const gchar     *app_uuid)

src/gcal-application.h

@@ -36,8 +36,6 @@ GcalApplication*     gcal_application_new                        (void);
 
 GcalContext*         gcal_application_get_context                (GcalApplication    *self);
 
-GcalManager*         gcal_application_get_manager                (GcalApplication    *self);
-
 void                 gcal_application_set_uuid                   (GcalApplication    *self,
                                                                   const gchar        *app_uuid);