Documentation is installed by dh_installdocs, so this is unnecessary.

This prevents COPYING and README being installed into /usr.

diff -Nruad -Nruad trac-git-0.0.20080122.orig/0.10/setup.py trac-git-0.0.20080122/0.10/setup.py
--- trac-git-0.0.20080122.orig/0.10/setup.py    2008-05-19 14:07:05.000000000 +0100
+++ trac-git-0.0.20080122/0.10/setup.py 2008-05-19 14:07:24.000000000 +0100
@@ -18,6 +18,5 @@
     entry_points = {'trac.plugins':
                     ['git = gitplugin.git_fs'],
                     },
-    data_files=['COPYING','README'],
     install_requires=[],
     )