Revert changes to make test work in CI (#110)

* Revert " Add any casting to fix TypeScript bug  (#109)"

This reverts commit 535ba9b242.

* Revert "Add userAgent casting (#108)"

This reverts commit 17d5bba990.

* Revert "Extract userAgent variable to fix tests in Azure DevOps CI/CD (#107)"

This reverts commit 3807aff6af.

test/azureServiceClientTests.ts

@@ -2514,11 +2514,10 @@ describe("AzureServiceClient", () => {
   describe("updateOptionsWithDefaultValues()", () => {
     function assertOptionEqual(actual: AzureServiceClientOptions, expected: AzureServiceClientOptions) {
       let actualUserAgent: string | undefined;
-
       if (typeof actual.userAgent === "string") {
-        actualUserAgent = actual.userAgent!;
+        actualUserAgent = actual.userAgent;
       } else if (typeof actual.userAgent === "function") {
-        actualUserAgent = (actual.userAgent! as any)("");
+        actualUserAgent = actual.userAgent("");
       }
       delete actual.userAgent;
       delete expected.userAgent;