Issue #47, #48: Disable genshi and chameleon

These benchmarks are incompatible with Python 3.8 yet.

Author: vstinner

performance/benchmarks/__init__.py

@@ -9,15 +9,17 @@
 # specified.
 DEFAULT_GROUP = [
     '2to3',
-    'chameleon',
+    # Issue #47: Chameleon doesn't support Python 3.8 yet
+    # 'chameleon',
     'chaos',
     'crypto_pyaes',
     'deltablue',
     'django_template',
     'dulwich_log',
     'fannkuch',
     'float',
-    'genshi',
+    # Issue #46: Genshi doesn't support Python 3.8 yet
+    #'genshi',
     'go',
     'hexiom',
     'hg_startup',