remove enum requirement now that we're not using enum
diff --git a/setup.py b/setup.py
index cbbf100..d37b3fb 100644
--- a/setup.py
+++ b/setup.py
@@ -32,9 +32,6 @@
     CFFI_DEPENDENCY,
 ]
 
-if sys.version_info[:2] < (3, 4):
-    install_requires += ["enum34"]
-
 setup(
     name=about["__title__"],
     version=about["__version__"],