remove unused default case

chat.go

@@ -143,8 +143,6 @@ func (c *ChatAPI) SendRaw(ctx context.Context, msg []byte) ([]byte, error) {
 			}
 		case <-ctx.Done():
 			return nil, ctx.Err()
-		default:
-			// still waiting, do nothing
 		}
 	}
 }