Remove commons-io dep management
Remove commons-io dep management

- Now managed by parent build
- Fixes #4517

jvalkeal/spring-cloud-dataflow,jvalkeal/spring-cloud-data,spring-cloud/spring-cloud-dataflow,spring-cloud/spring-cloud-data,jvalkeal/spring-cloud-dataflow,spring-cloud/spring-cloud-dataflow,spring-cloud/spring-cloud-dataflow,jvalkeal/spring-cloud-dataflow,spring-cloud/spring-cloud-dataflow,jvalkeal/spring-cloud-dataflow,jvalkeal/spring-cloud-data,spring-cloud/spring-cloud-data,jvalkeal/spring-cloud-data,jvalkeal/spring-cloud-dataflow,spring-cloud/spring-cloud-dataflow,spring-cloud/spring-cloud-data