style: 불필요한 import문 삭제

Author: jay-so

Diff for: src/main/java/com/systemdesign/fixedwindowcounter/common/config/RedisConfig.java

@@ -1,13 +1,9 @@
 package com.systemdesign.fixedwindowcounter.common.config;
 
-import com.fasterxml.jackson.annotation.JsonAutoDetect;
-import com.fasterxml.jackson.annotation.PropertyAccessor;
-import com.fasterxml.jackson.databind.ObjectMapper;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.data.redis.connection.RedisConnectionFactory;
 import org.springframework.data.redis.core.RedisTemplate;
-import org.springframework.data.redis.core.StringRedisTemplate;
 import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
 import org.springframework.data.redis.serializer.StringRedisSerializer;