Revert "test: add middleware in flexChecks step"

This reverts commit d5514d5.

Author: trivikr

packages/middleware-flexible-checksums/src/middleware-flexible-checksums.retry.integ.spec.ts

@@ -2,8 +2,6 @@ import { S3 } from "@aws-sdk/client-s3";
 import { HttpResponse } from "@smithy/protocol-http";
 import { describe, expect, test as it } from "vitest";
 
-import { flexibleChecksumsMiddlewareOptions } from "./flexibleChecksumsMiddleware";
-
 describe("middleware-flexible-checksums.retry", () => {
   it("retry reuses the checksum", async () => {
     const maxAttempts = 3;
@@ -26,9 +24,10 @@ describe("middleware-flexible-checksums.retry", () => {
         return next(args);
       };
     }
-    client.middlewareStack.add(flexChecksCallCountMiddleware, {
+    client.middlewareStack.addRelativeTo(flexChecksCallCountMiddleware, {
       name: flexChecksCallCountMiddleware.name,
-      step: flexibleChecksumsMiddlewareOptions.step,
+      toMiddleware: "flexibleChecksumsMiddleware",
+      relation: "after",
     });
 
     client.middlewareStack.identifyOnResolve(true);