Fix syntax error on classifiers
diff --git a/setup.py b/setup.py
index 403c135..c90ca86 100644
--- a/setup.py
+++ b/setup.py
@@ -70,7 +70,7 @@
     'Programming Language :: Python :: 3.5',
     'Programming Language :: Python :: 3.6',
     'License :: OSI Approved :: Apache Software License',
-],
+]
 
 # Environment variable to determine whether or not the Cython extension should
 # *use* Cython or use the generated C files. Note that this requires the C files