Remove some luigi config if using newer package

apparently some of these settings are no longer used by latest luigi,
and it complains when they're present

rattail_fabric2/luigi.py

@@ -25,6 +25,8 @@ Fabric library for Luigi apps
 """
 
 import os
+import re
+from pkg_resources import parse_version
 
 from rattail_fabric2 import postgresql, make_deploy, mkdir
 
@@ -48,6 +50,14 @@ def install_luigi(c, envroot, luigi='luigi', user='rattail',
     c.sudo("""bash -lc "workon {} && pip install '{}'" """.format(envname, luigi),
            user=user)
 
+    # detect luigi version
+    LUIGI2 = False
+    output = c.sudo("bash -lc 'workon {} && pip show luigi | grep Version'".format(envname), user=user).stdout.strip()
+    match = re.match(r'^Version: (\d+\S+)$', output)
+    if match:
+        if parse_version(match.group(1)) < parse_version('3'):
+            LUIGI2 = True
+
     # dirs
     mkdir(c, ['{}/luigi'.format(appdir),
               '{}/luigi/log'.format(appdir),