simplify QmdlWriter

lib/src/qmdl.rs

@@ -37,18 +37,9 @@ where
 
     pub async fn write_container(&mut self, container: &MessagesContainer) -> std::io::Result<()> {
         for msg in &container.messages {
-            // for a gzipped file, we can't use `msg.data.len()` to
-            // determine the number of bytes written, so we have to
-            // manually do a `write_all()` type loop
-            let mut buf = Cursor::new(&msg.data);
-            loop {
-                let bytes_written = self.writer.write_buf(&mut buf).await?;
-                self.writer.flush().await?;
-                if bytes_written == 0 {
-                    break;
-                }
-                self.total_uncompressed_bytes += bytes_written;
-            }
+            self.writer.write_all(&msg.data).await?;
+            self.writer.flush().await?;
+            self.total_uncompressed_bytes += msg.data.len();
         }
         Ok(())
     }