There is a config in ServiceConfiguration called disableBrokerInterceptors introduced by #8157, which seems to disable the broker interceptor, but is commented for testing only. Actually, whether to enable the interceptor depends on whether the broker is loaded into the interceptors. #10489 kept the same implementation. But #20422 has changed the behavior, it uses disableBrokerInterceptors to judge whether to enable the interceptor, which caused an NPE issue mentioned in #20710. This disableBrokerInterceptors config is very confusing, so we decide to delete it.
Delete config disableBrokerInterceptors.
No backward & forward compatibility issue