delete(metadata, xhttp.AmzMetaUnencryptedContentLength)
	delete(metadata, xhttp.AmzMetaUnencryptedContentMD5)
}

// RemoveSSEHeaders removes all crypto-specific SSE
// header entries from the metadata map.
func RemoveSSEHeaders(metadata map[string]string) {
	delete(metadata, xhttp.AmzServerSideEncryption)
	delete(metadata, xhttp.AmzServerSideEncryptionKmsID)

		switch k {
		case metaTierName, metaTierStatus, metaTierObjName, metaTierVersionID:
			continue
		}
		defaultMeta[k] = v
	}

	// remove SSE Headers from source info
	crypto.RemoveSSEHeaders(defaultMeta)

	// Storage class is special, it can be replaced regardless of the
	// metadata directive, if set should be preserved and replaced
	// to the destination metadata.