validation-tests: remove useless parse_value & parse_literal

Replicates graphql/graphql-js@63ee811

Author: Cito

tests/validation/harness.py

@@ -239,12 +239,7 @@ def raise_type_error(message):
     ),
 )
 
-AnyScalar = GraphQLScalarType(
-    name="Any",
-    serialize=lambda value: value,
-    parse_literal=lambda node: node,  # Allows any value
-    parse_value=lambda value: value,
-)  # Allows any value
+AnyScalar = GraphQLScalarType(name="Any", serialize=lambda value: value)
 
 QueryRoot = GraphQLObjectType(
     "QueryRoot",