fix: code example

Author: whutchinson98

packages/s3-request-presigner/README.md

@@ -134,17 +134,6 @@ const command = new PutObjectCommand({
   ContentType: contentType,
 });
 
-// Set of non x-amz-* you wish to have signed
-const signableHeaders = new Set(["content-type"]);
-
-const presigned = getSignedUrl(s3Client, command, {
-  signableHeaders,
-  expiresIn: expiration,
-  // Set of all x-amz-* headers you wish to have signed
-  unhoistableHeaders: new Set(["x-amz-checksum-sha256"]),
-  ContentType: contentType,
-});
-
 const presigned = getSignedUrl(s3Client, command, {
   signableHeaders: new Set(["content-type"]),
   expiresIn: expiration,