[fractal] Remove initial as argument for backend::sync

[Alejandro Domínguez <aledomu src gnome org>]

commit c36e53d02ce28db6e499e025408003baab4c661b
Author: Alejandro Domínguez <adomu net-c com>
Date:   Wed Dec 2 09:51:01 2020 +0100

    Remove initial as argument for backend::sync

 fractal-gtk/src/appop/sync.rs   | 1 -
 fractal-gtk/src/backend/sync.rs | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/fractal-gtk/src/appop/sync.rs b/fractal-gtk/src/appop/sync.rs
index 9f036fbc..b72d969c 100644
--- a/fractal-gtk/src/appop/sync.rs
+++ b/fractal-gtk/src/appop/sync.rs
@@ -30,7 +30,6 @@ impl AppOp {
                     login_data.session_client,
                     login_data.uid,
                     since,
-                    initial,
                     number_tries,
                 )
                 .await;
diff --git a/fractal-gtk/src/backend/sync.rs b/fractal-gtk/src/backend/sync.rs
index a5d58f4d..78d4b682 100644
--- a/fractal-gtk/src/backend/sync.rs
+++ b/fractal-gtk/src/backend/sync.rs
@@ -76,9 +76,9 @@ pub async fn sync(
     session_client: MatrixClient,
     user_id: UserId,
     since: Option<String>,
-    initial: bool,
     number_tries: u32,
 ) -> Result<SyncRet, SyncError> {
+    let initial = since.is_none();
     let timeline_not_types = [String::from("m.call.*")];
     let timeline_types = [String::from("m.room.message"), String::from("m.sticker")];
     let state_types = [String::from("m.room.*")];