remove redundant updating of metadata in groups_create_group()

[jreeve]

While working on #6158, I noticed that groups_create_group() in bp-groups/bp-groups-functions.php was calling groups_update_groupmeta():

groups_update_groupmeta( $group->id, 'last_activity', bp_core_current_time() );

but this was already being handled the right way by hooking groups_update_last_activity() into the action groups_created_group in bp-groups/bp-groups-activity.php:

add_action( 'groups_created_group', 'groups_update_last_activity' );.

Unless I'm mistaken (it's possible there's something about this I'm missing), this is redundant. The attached patch simply removes this redundant function call.

[jreeve]

remove redundant function call for updating group metadata about last activity

[r-a-y]

Going to close this as a duplicate of #6158 as the updated patch in 6158 merges both fixes.

Thanks jreeve!