Revert "Fix two-way stream cancelation and pings (#19763)"

This reverts commit 4d698841f4.

internal/grid/stream.go

@@ -89,26 +89,12 @@ func (s *Stream) Results(next func(b []byte) error) (err error) {
 				return nil
 			}
 			if resp.Err != nil {
-				s.cancel(resp.Err)
 				return resp.Err
 			}
 			err = next(resp.Msg)
 			if err != nil {
-				s.cancel(err)
 				return err
 			}
 		}
 	}
 }
-
-// Done will return a channel that will be closed when the stream is done.
-// This mirrors context.Done().
-func (s *Stream) Done() <-chan struct{} {
-	return s.ctx.Done()
-}
-
-// Err will return the error that caused the stream to end.
-// This mirrors context.Err().
-func (s *Stream) Err() error {
-	return s.ctx.Err()
-}