MINOR: clean up unused checkstyle suppressions for Streams (#8861)
MINOR: clean up unused checkstyle suppressions for Streams (#8861)

Reviewers: John Roesler <a51dda7c7ff50b61eaea0444371f4a6a9301e501@confluent.io>, Matthias J. Sax <matthias@confluent.io>
lindong28/kafka,apache/kafka,Chasego/kafka,Chasego/kafka,apache/kafka,guozhangwang/kafka,TiVo/kafka,TiVo/kafka,guozhangwang/kafka,Chasego/kafka,Chasego/kafka,guozhangwang/kafka,lindong28/kafka,lindong28/kafka,TiVo/kafka,apache/kafka,guozhangwang/kafka,TiVo/kafka,lindong28/kafka,apache/kafka