remove duplicate code (#5226)

Signed-off-by: yiyang5055 <yiyang5055@gmail.com>

Author: yiyang5055

pkg/ring/client/pool.go

@@ -13,7 +13,7 @@ import (
 	"github.com/weaveworks/common/user"
 	"google.golang.org/grpc/health/grpc_health_v1"
 
-	"github.com/cortexproject/cortex/pkg/ring/util"
+	"github.com/cortexproject/cortex/pkg/util"
 	"github.com/cortexproject/cortex/pkg/util/services"
 )
 

pkg/ring/ring.go

@@ -19,7 +19,7 @@ import (
 
 	"github.com/cortexproject/cortex/pkg/ring/kv"
 	shardUtil "github.com/cortexproject/cortex/pkg/ring/shard"
-	"github.com/cortexproject/cortex/pkg/ring/util"
+	"github.com/cortexproject/cortex/pkg/util"
 	"github.com/cortexproject/cortex/pkg/util/flagext"
 	utilmath "github.com/cortexproject/cortex/pkg/util/math"
 	"github.com/cortexproject/cortex/pkg/util/services"

pkg/ring/ring_test.go

@@ -21,7 +21,7 @@ import (
 	"github.com/cortexproject/cortex/pkg/ring/kv"
 	"github.com/cortexproject/cortex/pkg/ring/kv/consul"
 	"github.com/cortexproject/cortex/pkg/ring/shard"
-	"github.com/cortexproject/cortex/pkg/ring/util"
+	"github.com/cortexproject/cortex/pkg/util"
 	"github.com/cortexproject/cortex/pkg/util/flagext"
 	"github.com/cortexproject/cortex/pkg/util/services"
 	"github.com/cortexproject/cortex/pkg/util/test"