removed support of xml and json config.

Changed the evaluation pattern to $|x|.

test/validation/param.yaml

@@ -1,5 +1,5 @@
 # All sub directory in items are evaluated as a list
-items: @| [os.path.basename(f.path) for f in os.scandir(os.path.join(r"$(test_directory)", "items")) if f.is_dir()] |
+items: $| [os.path.basename(f.path) for f in os.scandir(os.path.join(r"$(test_directory)", "items")) if f.is_dir()] |
   # - common
   # - check
   # - console