Polish

spring-web/src/main/java/org/springframework/http/codec/ServerCodecConfigurer.java

@@ -17,7 +17,6 @@
 package org.springframework.http.codec;
 
 import org.springframework.core.codec.Encoder;
-import org.springframework.http.codec.json.Jackson2JsonEncoder;
 
 /**
  * Helps to configure a list of server-side HTTP message readers and writers

spring-web/src/main/java/org/springframework/http/converter/json/Jackson2ObjectMapperFactoryBean.java

@@ -46,7 +46,6 @@ import org.springframework.beans.factory.FactoryBean;
 import org.springframework.beans.factory.InitializingBean;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
-import org.springframework.lang.Nullable;
 
 /**
  * A {@link FactoryBean} for creating a Jackson 2.x {@link ObjectMapper} (default) or

spring-web/src/main/java/org/springframework/web/bind/UnsatisfiedServletRequestParameterException.java

@@ -22,7 +22,6 @@ import java.util.List;
 import java.util.Map;
 
 import org.springframework.util.Assert;
-import org.springframework.util.CollectionUtils;
 import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
 

spring-web/src/main/java/org/springframework/web/method/support/CompositeUriComponentsContributor.java

@@ -26,7 +26,6 @@ import org.springframework.core.MethodParameter;
 import org.springframework.core.convert.ConversionService;
 import org.springframework.format.support.DefaultFormattingConversionService;
 import org.springframework.lang.Nullable;
-import org.springframework.util.Assert;
 import org.springframework.web.util.UriComponentsBuilder;
 
 /**

spring-web/src/main/java/org/springframework/web/multipart/support/MultipartFilter.java

@@ -23,7 +23,6 @@ import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
-import org.springframework.lang.Nullable;
 import org.springframework.web.context.WebApplicationContext;
 import org.springframework.web.context.support.WebApplicationContextUtils;
 import org.springframework.web.filter.OncePerRequestFilter;

spring-web/src/main/java/org/springframework/web/server/handler/FilteringWebHandler.java

@@ -17,7 +17,6 @@
 package org.springframework.web.server.handler;
 
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 
 import reactor.core.publisher.Mono;