[geary/wip/serial-db-724475] Don't needlessly update column

[Charles Lindsay <clindsay src gnome org>]

commit f4d13ab8722b623352fa267b71fab8339f92007c
Author: Charles Lindsay <chaz yorba org>
Date:   Fri Feb 28 17:11:04 2014 -0800

    Don't needlessly update column
    
    Turns out this update was sloooow.

 sql/version-018.sql |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/sql/version-018.sql b/sql/version-018.sql
index eda5126..c0a38df 100644
--- a/sql/version-018.sql
+++ b/sql/version-018.sql
@@ -1,6 +1,4 @@
 --
--- Nuke the internaldate_time_t column, because it had the wrong values.  It'll
--- be repopulated in code, in imap-db-database.vala.
+-- Dummy upgrade to nuke the internaldate_time_t column, because it had the
+-- wrong values.  It'll be repopulated in code, in imap-db-database.vala.
 --
-
-UPDATE MessageTable SET internaldate_time_t = NULL;