gRPC migration update

Change-Id: Icdd1a824948fa994cd36bd121c962f5ecf74e3cf
diff --git a/vendor/github.com/Shopify/sarama/zstd.go b/vendor/github.com/Shopify/sarama/zstd.go
index 58880e2..e23bfc4 100644
--- a/vendor/github.com/Shopify/sarama/zstd.go
+++ b/vendor/github.com/Shopify/sarama/zstd.go
@@ -2,26 +2,17 @@
 
 import (
 	"github.com/klauspost/compress/zstd"
-	"sync"
 )
 
 var (
-	zstdDec *zstd.Decoder
-	zstdEnc *zstd.Encoder
-
-	zstdEncOnce, zstdDecOnce sync.Once
+	zstdDec, _ = zstd.NewReader(nil)
+	zstdEnc, _ = zstd.NewWriter(nil, zstd.WithZeroFrames(true))
 )
 
 func zstdDecompress(dst, src []byte) ([]byte, error) {
-	zstdDecOnce.Do(func() {
-		zstdDec, _ = zstd.NewReader(nil)
-	})
 	return zstdDec.DecodeAll(src, dst)
 }
 
 func zstdCompress(dst, src []byte) ([]byte, error) {
-	zstdEncOnce.Do(func() {
-		zstdEnc, _ = zstd.NewWriter(nil, zstd.WithZeroFrames(true))
-	})
 	return zstdEnc.EncodeAll(src, dst), nil
 }