build: Temporarily remove libedataserverui dep

Since we'll be switching to GTK4, we can't depend on this
library which links to GTK3. There's a GTK4 port underway,
we'll reenable when it lands

src/core/gcal-manager.c

@@ -26,7 +26,7 @@
 #include "gcal-timeline-subscriber.h"
 #include "gcal-utils.h"
 
-#include <libedataserverui/libedataserverui.h>
+//#include <libedataserverui/libedataserverui.h>
 
 /**
  * SECTION:gcal-manager
@@ -66,7 +66,7 @@ struct _GcalManager
   GHashTable         *clients;
 
   ESourceRegistry    *source_registry;
-  ECredentialsPrompter *credentials_prompter;
+  //ECredentialsPrompter *credentials_prompter;
 
   GCancellable       *async_ops;
 
@@ -398,6 +398,8 @@ on_event_removed (GObject      *source_object,
   GCAL_EXIT;
 }
 
+#if 0 /* libedataserverui */
+
 static void
 show_source_error (const gchar  *where,
                    const gchar  *what,
@@ -540,6 +542,8 @@ source_get_last_credentials_required_arguments_cb (GObject      *source_object,
   GCAL_EXIT;
 }
 
+#endif /* libedataserverui */
+
 static void
 gcal_manager_finalize (GObject *object)
 {
@@ -1200,7 +1204,6 @@ gcal_manager_startup (GcalManager *self)
 {
   GList *sources, *l;
   GError *error = NULL;
-  ESourceCredentialsProvider *credentials_provider;
 
   GCAL_ENTRY;
 
@@ -1230,6 +1233,9 @@ gcal_manager_startup (GcalManager *self)
                                self,
                                NULL);
 
+#if 0 /* libedataserverui */
+  ESourceCredentialsProvider *credentials_provider;
+
   self->credentials_prompter = e_credentials_prompter_new (self->source_registry);
 
   /* First disable credentials prompt for all but calendar sources... */
@@ -1294,6 +1300,8 @@ gcal_manager_startup (GcalManager *self)
 
   e_credentials_prompter_process_awaiting_credentials (self->credentials_prompter);
 
+#endif /* libedataserverui */
+
   g_signal_connect_object (self->source_registry, "source-added", G_CALLBACK (load_source), self, G_CONNECT_SWAPPED);
   g_signal_connect_object (self->source_registry, "source-removed", G_CALLBACK (remove_source), self, G_CONNECT_SWAPPED);
   g_signal_connect_object (self->source_registry, "source-changed", G_CALLBACK (source_changed), self, G_CONNECT_SWAPPED);