Revert "Abomination of a test fix" (Test not actually fixed)

This reverts commit c59d674.

Author: pushfoo

tests/unit/test_arcade.py

@@ -2,7 +2,6 @@
 from copy import copy
 import logging
 import arcade
-import inspect
 from arcade import *
 
 
@@ -17,13 +16,9 @@ def test_import():
     remaining = arcade_names - common
     for name in copy(remaining):
         attr = getattr(arcade, name)
-        if type(attr) is ModuleType or not inspect.isroutine(attr):
+        if type(attr) is ModuleType:
             remaining.remove(name)
-        # Extra awful trick because:
-        # 1. attempting to get __module__ of bool members raises AttributeError
-        # 2. inspect.isbuiltin(bool) does not return True for bool
-        # 2. inspect.getmodule(bool) returns the builtins module
-        elif not inspect.getmodule(attr).__name__.startswith('arcade.'):
+        elif not attr.__module__.startswith('arcade.'):
             remaining.remove(name)
 
     assert len(remaining) == 0