ditch custom virtualenv_prompt in favor of one in base
diff --git a/themes/doubletime/doubletime.theme.bash b/themes/doubletime/doubletime.theme.bash
index e16ba66..997b3f2 100644
--- a/themes/doubletime/doubletime.theme.bash
+++ b/themes/doubletime/doubletime.theme.bash
@@ -26,13 +26,6 @@
   fi
 }
 
-virtualenv_prompt() {
-  if [ ! -z "$VIRTUAL_ENV" ]
-  then
-    echo "(`basename $VIRTUAL_ENV`) "
-  fi
-}
-
 function prompt_setter() {
   # Save history
   history -a