Revert "Try using executemany().  Refs #11287, 9648, 11385"
Revert "Try using executemany().  Refs #11287, 9648, 11385"

This reverts commit 5738e04f43ada2747ec5326db294c58de2ab89ba.

git-svn-id: 2159781fc7c14c6bdd1f7e265daf7a25099c31e7@13705 7322e99d-02ea-0310-aa39-e9a107903beb

trac-hacks/trac-jsGantt,trac-hacks/trac-jsGantt,trac-hacks/trac-jsGantt