refactor: remove PR-scoped comment from AuthenticatorTest

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: andy-radchenko

smartling-api-commons/src/test/java/com/smartling/api/v2/client/auth/AuthenticatorTest.java

@@ -148,8 +148,6 @@ public void refreshExpiresAtUsesSecondsToMillisConversion()
         when(clock.currentTimeMillis()).thenReturn(System.currentTimeMillis());
         authenticator.getAccessToken();
 
-        // refreshExpiresAt must be computed with a *1000 (not *100) conversion,
-        // so it should still be refreshable just before the real TTL elapses.
         when(clock.currentTimeMillis()).thenReturn(REFRESH_TOKEN_TTL * 1000 + System.currentTimeMillis() - 1000);
         assertTrue(authenticator.isRefreshable());
     }