YAML to Mux: remove unused Value class

The reason for this to exist was supposedly identify (inheritance)
checks, but none of these actually exist.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

optional_plugins/varianter_yaml_to_mux/avocado_varianter_yaml_to_mux/__init__.py

@@ -66,11 +66,6 @@ class _BaseLoader(Loader):
                            lambda *_: mux.Control(YAML_FILTER_OUT))
 
 
-class Value(tuple):     # Few methods pylint: disable=R0903
-
-    """Used to mark values to simplify checking for node vs. value"""
-
-
 class ListOfNodeObjects(list):     # Few methods pylint: disable=R0903
 
     """
@@ -225,7 +220,7 @@ def _create_from_yaml(path, cls_node=mux.MuxTreeNode):
             elif values is None:            # Empty node
                 objects.append(cls_node(str(name)))
             else:                           # Values
-                objects.append(Value((name, values)))
+                objects.append((name, values))
         return objects
 
     def mux_loader(loader, obj):