diff --git a/br/pkg/storage/gcs.go b/br/pkg/storage/gcs.go
index ca8bfa24191cb..c5f7d18a4a3b5 100644
--- a/br/pkg/storage/gcs.go
+++ b/br/pkg/storage/gcs.go
@@ -290,39 +290,7 @@ func newGCSStorage(ctx context.Context, gcs *backuppb.GCS, opts *ExternalStorage
 	}
 
 	bucket := client.Bucket(gcs.Bucket)
-<<<<<<< HEAD
-	// check whether it's a bug before #647, to solve case #2
-	// If the storage is set as gcs://bucket/prefix/,
-	// the backupmeta is written correctly to gcs://bucket/prefix/backupmeta,
-	// but the SSTs are written wrongly to gcs://bucket/prefix//*.sst (note the extra slash).
-	// see details about case 2 at https://github.com/pingcap/br/issues/675#issuecomment-753780742
-	sstInPrefix := hasSSTFiles(ctx, bucket, gcs.Prefix)
-	sstInPrefixSlash := hasSSTFiles(ctx, bucket, gcs.Prefix+"//")
-	if sstInPrefixSlash && !sstInPrefix {
-		// This is a old bug, but we must make it compatible.
-		// so we need find sst in slash directory
-		gcs.Prefix += "//"
-	}
 	return &gcsStorage{gcs: gcs, bucket: bucket}, nil
-=======
-	return &GCSStorage{gcs: gcs, bucket: bucket, cli: client}, nil
-}
-
-func shouldRetry(err error) bool {
-	if storage.ShouldRetry(err) {
-		return true
-	}
-
-	// workaround for https://github.com/googleapis/google-cloud-go/issues/9262
-	if e := (&googleapi.Error{}); goerrors.As(err, &e) {
-		if e.Code == 401 && strings.Contains(e.Message, "Authentication required.") {
-			log.Warn("retrying gcs request due to internal authentication error", zap.Error(err))
-			return true
-		}
-	}
-
-	return false
->>>>>>> c92094fcb48 (external: remove old compatibility check of BR (#50534))
 }
 
 // gcsObjectReader wrap storage.Reader and add the `Seek` method.