Remove extra build directory (follow up to PR 1476) (#1497)
Remove extra build directory (follow up to PR 1476) (#1497)

This PR removes extra build directory as it looks like
there is one more `rm -rf build` needs to be invoked.

Signed-off-by: Yong Tang <765086fe2e0c1f980161f127fec596800f327f62@outlook.com>
tensorflow/io,tensorflow/io,tensorflow/io,tensorflow/io,tensorflow/io,tensorflow/io,tensorflow/io