Update index.rst: Remove * (#465)

Co-authored-by: Julien Danjou <julien@danjou.info>
diff --git a/doc/source/index.rst b/doc/source/index.rst
index bdf7ff2..3f0764a 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -79,7 +79,7 @@
 Basic Retry
 ~~~~~~~~~~~
 
-.. testsetup:: *
+.. testsetup::
 
     import logging
     #