[autopep8] W391 - Remove trailing blank lines

cubicweb_activitystream/__pkginfo__.py

@@ -23,4 +23,3 @@ classifiers = [
     'Programming Language :: Python :: 3',
     'Programming Language :: JavaScript',
 ]
-

cubicweb_activitystream/migration/postcreate.py

@@ -22,4 +22,3 @@ You could setup site properties or a workflow here for example.
 
 # Example of site property change
 #set_property('ui.site-title', "<sitename>")
-