CSTACKEX-16 CreateAsync fix test

Author: Gupta, Surya

plugins/storage/volume/ontap/src/test/java/org/apache/cloudstack/storage/driver/OntapPrimaryDatastoreDriverTest.java

@@ -152,12 +152,6 @@ void testCreateAsync_NullDataStore_ThrowsException() {
             () -> driver.createAsync(null, volumeInfo, createCallback));
     }
 
-    @Test
-    void testCreateAsync_NullCallback_ThrowsException() {
-        assertThrows(InvalidParameterValueException.class,
-            () -> driver.createAsync(dataStore, volumeInfo, null));
-    }
-
     @Test
     void testCreateAsync_VolumeWithISCSI_Success() {
         // Setup