[dak/master] Remove install_date from not_null_constraints

[Mark Hymers <mhy@debian.org>]

Signed-off-by: Mark Hymers <mhy@debian.org>
---
 daklib/dbconn.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/daklib/dbconn.py b/daklib/dbconn.py
index 985caf1..2d10eff 100644
--- a/daklib/dbconn.py
+++ b/daklib/dbconn.py
@@ -1721,7 +1721,7 @@ class DBSource(ORMObject):
             'install_date', 'binaries_count', 'uploaders_count']
 
     def not_null_constraints(self):
-        return ['source', 'version', 'install_date', 'maintainer', \
+        return ['source', 'version', 'maintainer', \
             'changedby', 'poolfile']
 
     def read_control_fields(self):
-- 
2.1.4