get rid of submodule init--not needed post-askbot

rakefile

@@ -54,7 +54,6 @@ default_options = {
 task :predjango do
     sh("find . -type f -name *.pyc -delete")
     sh('pip install -q --upgrade -r local-requirements.txt')
-    sh('git submodule update --init')
 end
 
 task :clean_test_files do