[moblab] Remove setting that does not exist in maridb 5

As of 69 we move to mariadb 10x - when tuning the db a setting
was moved back by accident - remove it.

BUG=None
TEST=ad hoc testing

Change-Id: I0e766f0947d04fdca15d23efc7306d04a0a4d35b
Reviewed-on: https://chromium-review.googlesource.com/1228653
Reviewed-by: Keith Haddow <haddowk@chromium.org>
Commit-Queue: Keith Haddow <haddowk@chromium.org>
Tested-by: Keith Haddow <haddowk@chromium.org>
Trybot-Ready: Keith Haddow <haddowk@chromium.org>
diff --git a/project-moblab/chromeos-base/chromeos-bsp-moblab/files/mysql_defaults_extra.cnf b/project-moblab/chromeos-base/chromeos-bsp-moblab/files/mysql_defaults_extra.cnf
index e59c47b..d94ab7c 100644
--- a/project-moblab/chromeos-base/chromeos-bsp-moblab/files/mysql_defaults_extra.cnf
+++ b/project-moblab/chromeos-base/chromeos-bsp-moblab/files/mysql_defaults_extra.cnf
@@ -7,7 +7,7 @@
 skip_log_bin
 
 # Kill any statement taking more than 1 hour
-max_statement_time=3600
+#max_statement_time=3600
 wait_timeout=3600
 
 # This enables debug logging