Since we started loading our DataSource from gerrit.config we no longer
read GerritServer.properties in the daemon code path and thus do not
need this system property to be defined when launching the program.
Change-Id: I89387cbc2421a61c512f7d13f6e0bc663e7f2688
Signed-off-by: Shawn O. Pearce <sop@google.com>