chore: upgrade rust version to 1.70 (#2749)

* chore: upgrade rust version to 1.70

* ci: fix wanrings

* ci: fix clippy warings

frontend/rust-lib/flowy-user/src/entities/user_setting.rs

@@ -49,19 +49,14 @@ pub struct AppearanceSettingsPB {
 
 const DEFAULT_RESET_VALUE: fn() -> bool = || APPEARANCE_RESET_AS_DEFAULT;
 
-#[derive(ProtoBuf_Enum, Serialize, Deserialize, Clone, Debug)]
+#[derive(ProtoBuf_Enum, Serialize, Deserialize, Clone, Debug, Default)]
 pub enum ThemeModePB {
   Light = 0,
   Dark = 1,
+  #[default]
   System = 2,
 }
 
-impl std::default::Default for ThemeModePB {
-  fn default() -> Self {
-    ThemeModePB::System
-  }
-}
-
 #[derive(ProtoBuf, Serialize, Deserialize, Debug, Clone)]
 pub struct LocaleSettingsPB {
   #[pb(index = 1)]

frontend/rust-lib/flowy-user/src/notification.rs

@@ -2,19 +2,14 @@ use flowy_derive::ProtoBuf_Enum;
 use flowy_notification::NotificationBuilder;
 const OBSERVABLE_CATEGORY: &str = "User";
 
-#[derive(ProtoBuf_Enum, Debug)]
+#[derive(ProtoBuf_Enum, Debug, Default)]
 pub(crate) enum UserNotification {
+  #[default]
   Unknown = 0,
   DidUserSignIn = 1,
   DidUpdateUserProfile = 2,
 }
 
-impl std::default::Default for UserNotification {
-  fn default() -> Self {
-    UserNotification::Unknown
-  }
-}
-
 impl std::convert::From<UserNotification> for i32 {
   fn from(notification: UserNotification) -> Self {
     notification as i32

frontend/rust-lib/flowy-user/src/services/user_session.rs

@@ -177,7 +177,7 @@ impl UserSession {
 
     let server = self.cloud_services.get_auth_service()?;
     let token = session.token;
-    let _ = tokio::spawn(async move {
+    tokio::spawn(async move {
       match server.sign_out(token).await {
         Ok(_) => {},
         Err(e) => tracing::error!("Sign out failed: {:?}", e),