Remove manage micrometer prometheus-rsocket-spring
Remove manage micrometer prometheus-rsocket-spring

- In favour of spring-cloud/spring-cloud-dataflow-build#34
- Fixes #4531

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