test(client): fix auth review nits

Author: rechedev9

packages/client/test/client/auth.test.ts

@@ -3491,12 +3491,8 @@ describe('OAuth Authorization', () => {
             expect(() => validateClientMetadataUrl(undefined)).not.toThrow();
         });
 
-        it('passes silently when called with no arguments', () => {
-            // eslint-disable-next-line unicorn/no-useless-undefined
-            expect(() => validateClientMetadataUrl(undefined)).not.toThrow();
-        });
-
         it('error message matches expected format', () => {
+            expect(() => validateClientMetadataUrl('http://example.com/path')).toThrow(OAuthError);
             try {
                 validateClientMetadataUrl('http://example.com/path');
             } catch (error) {