test: remove unneeded comment in BaseServiceUnitTest

Signed-off-by: Phil Adams <phil_adams@us.ibm.com>

Author: padamstx

src/test/java/com/ibm/cloud/sdk/core/test/BaseServiceUnitTest.java

@@ -38,7 +38,7 @@
 import static org.testng.Assert.assertNotNull;
 import static org.testng.Assert.assertTrue;
 
-public class BaseServiceUnitTest /* extends PowerMockTestCase */ {
+public class BaseServiceUnitTest {
  private static final Gson GSON = GsonSingleton.getGson();
 
  /** The server. */