Remove old repositories links from README
Remove old repositories links from README

Archived repositories that are confusing
jvalkeal/spring-cloud-data,spring-cloud/spring-cloud-dataflow,spring-cloud/spring-cloud-dataflow,spring-cloud/spring-cloud-dataflow,jvalkeal/spring-cloud-data,jvalkeal/spring-cloud-dataflow,jvalkeal/spring-cloud-data,jvalkeal/spring-cloud-dataflow,jvalkeal/spring-cloud-dataflow,jvalkeal/spring-cloud-dataflow,spring-cloud/spring-cloud-dataflow,spring-cloud/spring-cloud-dataflow,jvalkeal/spring-cloud-dataflow