Simplify code x2.

Author: cryscan

src/run.rs

@@ -730,15 +730,15 @@ where
         &self,
         context: GenerateContext,
     ) -> Pin<Box<dyn Future<Output = SlotResult> + Send + Sync + '_>> {
-        Box::pin(async move { self.queue(context).await })
+        Box::pin(self.queue(context))
     }
 
     #[inline]
     fn process<'a>(
         &'a self,
         payloads: &'a mut [Payload],
     ) -> Pin<Box<dyn Future<Output = Result<()>> + 'a>> {
-        Box::pin(async move { self.process(payloads).await })
+        Box::pin(self.process(payloads))
     }
 }