refactor: remove update_icons and disable_server_delete migrations

src/stock_str.rs

@@ -155,13 +155,6 @@ pub enum StockMessage {
                     To use the \"Saved messages\" feature again, create a new chat with yourself."))]
     SelfDeletedMsgBody = 91,
 
-    #[strum(props(
-        fallback = "⚠️ The \"Delete messages from server\" feature now also deletes messages in folders other than Inbox, DeltaChat and Sent.\n\n\
-                    ℹ️ To avoid accidentally deleting messages, we turned it off for you. Please turn it on again at \
-                    Settings → \"Chats and Media\" → \"Delete messages from server\" to continue using it."
-    ))]
-    DeleteServerTurnedOff = 92,
-
     #[strum(props(fallback = "Forwarded"))]
     Forwarded = 97,
 
@@ -1041,11 +1034,6 @@ pub(crate) async fn self_deleted_msg_body(context: &Context) -> String {
     translated(context, StockMessage::SelfDeletedMsgBody).await
 }
 
-/// Stock string: `⚠️ The "Delete messages from server" feature now also...`.
-pub(crate) async fn delete_server_turned_off(context: &Context) -> String {
-    translated(context, StockMessage::DeleteServerTurnedOff).await
-}
-
 /// Stock string: `Message deletion timer is set to %1$s minutes.`.
 pub(crate) async fn msg_ephemeral_timer_minutes(
     context: &Context,