Revert "updating to current Mathics-core master branch"

This reverts commit ca6ac69.

pymathics/hello/__main__.py

@@ -1,6 +1,5 @@
 # -*- coding: utf-8 -*-
-from mathics.core.atoms import String
-from mathics.core.builtin import Builtin
+from mathics.builtin.base import Builtin, String
 
 
 class Hello(Builtin):
@@ -14,7 +13,7 @@ class Hello(Builtin):
     """
 
     # The function below should start with "apply"
-    def eval_with_name(self, person, evaluation):
+    def apply_with_name(self, person, evaluation):
         "%(name)s[person_String]"
         # %(name)s is just a more flexible way of writing "Hello".
         # If the class name changes, so will the above pattern.

test/test_hello.py

@@ -1,11 +1,6 @@
-
-
-from mathics.core.load_builtin import import_and_load_builtins
 from mathics.session import MathicsSession
 
-import_and_load_builtins()
-
-session = MathicsSession(character_encoding="ASCII")
+session = MathicsSession(add_builtin=True, catch_interrupt=False)
 
 
 def check_evaluation(str_expr: str, expected: str, message=""):