Remove test for type var in observed type

Remove the incorrect test which was asserting that calling
BeanManager.isMatchingEvent with a type variable in the observed type
caused an exception.

This check should only be performed for the event type.

impl/src/main/java/org/jboss/cdi/tck/tests/beanContainer/assignability/BeanEventAssignabilityTest.java

@@ -234,9 +234,6 @@ public <X> void testEventMatchingTypeVarException() {
 
         assertThrows("Type variable in event type", IllegalArgumentException.class,
                 () -> getCurrentBeanContainer().isMatchingEvent(varEventType.getType(), Set.of(), MyBean.class, Set.of()));
-
-        assertThrows("Type variable in observed event type", IllegalArgumentException.class,
-                () -> getCurrentBeanContainer().isMatchingEvent(MyBean.class, Set.of(), varEventType.getType(), Set.of()));
     }
 
     @Test