Simplify reload test

Author: matthewfeickert

tests/test_experimental.py

@@ -1,5 +1,5 @@
 import sys
-from importlib import import_module, reload
+from importlib import reload
 from unittest import mock
 
 import pytest
@@ -16,10 +16,7 @@ def test_missing_experimental_extra():
     with mock.patch.dict(sys.modules):
         sys.modules["numexpr"] = None
         with pytest.raises(ModuleNotFoundError):
-            if "pyhf.experimental.modifiers" in sys.modules:
-                reload(sys.modules["pyhf.experimental.modifiers"])
-            else:
-                import_module("pyhf.experimental.modifiers")
+            reload(sys.modules["pyhf.experimental.modifiers"])
 
 
 def test_add_custom_modifier(backend):