Now that we have removed all trace of support for files specified by the Ant task, the `ignoreEmptyFiles` argument to some TestManager methods is always false ... and so can be eliminated.

@@ -1129,11 +1125,10 @@
                 Tool.this.error(msg);
             }
         });
         testManager.addTestFiles(testFileArgs, false);
         testManager.addTestFileIds(testFileIdArgs, false);
- testManager.addTestFiles(antFileArgs, true); <<<<<================
         testManager.addGroups(testGroupArgs);
 
         if (testManager.isEmpty())
             throw new TestManager.NoTests();