Revert "feat: support dual stack requests for aws clients (#52)"

This reverts commit 899c62ce06.

plugin/service/storage/const.go

@@ -7,9 +7,6 @@ const (
 	// ConstAwsEndpointUrl is the key for the endpoint url in the aws s3 client.
 	ConstAwsEndpointUrl = "endpoint_url"
 
-	// ConstAwsDualStack is the key for the dualstack flag in the aws s3 client.
-	ConstAwsDualStack = "dual_stack"
-
 	// defaultStreamChunkSize is the recommened chunk size for sending data through a stream
 	defaultStreamChunkSize = 65536 // 64 KiB
 )