fix redis config db field (#3395)

pkg/common/config/config.go

@@ -351,18 +351,10 @@ type Redis struct {
 	Address     []string `yaml:"address"`
 	Username    string   `yaml:"username"`
 	Password    string   `yaml:"password"`
-	RedisMode    string   `yaml:"redisMode"`
+	ClusterMode bool     `yaml:"clusterMode"`
 	DB          int      `yaml:"db"`
 	MaxRetry    int      `yaml:"maxRetry"`
 	PoolSize    int      `yaml:"poolSize"`
-	SentinelMode Sentinel `yaml:"sentinelMode"`
-}
-
-type Sentinel struct {
-	MasterName     string   `yaml:"masterName"`
-	SentinelAddrs  []string `yaml:"sentinelsAddrs"`
-	RouteByLatency bool     `yaml:"routeByLatency"`
-	RouteRandomly  bool     `yaml:"routeRandomly"`
 }
 
 type BeforeConfig struct {