ORC-2052: Remove unused IOUtils class

### What changes were proposed in this pull request?

This PR aims to remove unused `IOUtils` class.

### Why are the changes needed?

To simplify Apache ORC code base by removing the copied version of `commons-io` which was introduced by ORC-909.
- #815

### How was this patch tested?

Pass the CIs.

### Was this patch authored or co-authored using generative AI tooling?

No.

Closes #2475 from dongjoon-hyun/ORC-2052.

Authored-by: Dongjoon Hyun <dongjoon@apache.org>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>

Author: dongjoon-hyun