去除无效日志

mybatis-plus-support/src/main/java/com/baomidou/mybatisplus/service/impl/ServiceImpl.java

@@ -20,8 +20,6 @@ import java.util.List;
 import java.util.Map;
 
 import org.apache.ibatis.binding.MapperMethod;
-import org.apache.ibatis.logging.Log;
-import org.apache.ibatis.logging.LogFactory;
 import org.apache.ibatis.session.SqlSession;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.transaction.annotation.Transactional;
@@ -51,8 +49,6 @@ import com.baomidou.mybatisplus.toolkit.TableInfoHelper;
  */
 public class ServiceImpl<M extends BaseMapper<T>, T> implements IService<T> {
 
-    private static final Log logger = LogFactory.getLog(ServiceImpl.class);
-
     @Autowired
     protected M baseMapper;