Handler::func no longer requires a closure to be sync

src/state/handler.rs

@@ -12,8 +12,7 @@ type DynHanlder<T> = Box<
             MainDialogue,
             T,
         ) -> crate::PinnedFuture<'static, crate::Result<()>>
-        + Send
-        + Sync,
+        + Send,
 >;
 
 pub struct Handler<T> {
@@ -31,12 +30,11 @@ impl<T> Handler<T> {
     where
         H: FnOnce(Throttle<Bot>, Message, DatabaseConnection, MainDialogue, T) -> F
             + Send
-            + Sync
             + 'static,
         F: Future<Output = crate::Result<()>> + Send + 'static,
     {
         let handler = Self {
-            func: Some(Box::new(move |bot, msg, db, dialogue, val| {
+            func: Some(Box::new(|bot, msg, db, dialogue, val| {
                 Box::pin(f(bot, msg, db, dialogue, val))
             })),
             previous: previous.into(),