Simplify and remove UserWarning testing on numexpr import

pandas/tests/computation/test_compat.py

@@ -11,11 +11,6 @@
 from pandas.computation.engines import _engines
 import pandas.computation.expr as expr
 from pandas.computation import _MIN_NUMEXPR_VERSION
-# Get reload for Python 3.4 and on, if not, use internal reload()
-try:
-    from importlib import reload
-except ImportError:
-    pass
 
 ENGINES_PARSERS = list(product(_engines, expr._parsers))
 
@@ -28,13 +23,9 @@ def test_compat():
         import numexpr as ne
         ver = ne.__version__
         if ver < LooseVersion(_MIN_NUMEXPR_VERSION):
-            with tm.assert_produces_warning(UserWarning,
-                                            check_stacklevel=False):
-                reload(pd.computation)
             assert not _NUMEXPR_INSTALLED
         else:
             assert _NUMEXPR_INSTALLED
-
     except ImportError:
         pytest.skip("not testing numexpr version compat")