Fix styles

Author: olegz

core/spring-cloud-stream/src/main/java/org/springframework/cloud/stream/config/BindingServiceProperties.java

@@ -21,7 +21,6 @@
 import java.util.List;
 import java.util.Map;
 import java.util.TreeMap;
-import java.util.concurrent.ConcurrentHashMap;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonInclude.Include;
@@ -45,7 +44,6 @@
 import org.springframework.core.convert.support.GenericConversionService;
 import org.springframework.integration.support.utils.IntegrationUtils;
 import org.springframework.util.Assert;
-import org.springframework.util.LinkedCaseInsensitiveMap;
 
 /**
  * @author Dave Syer