Fix delete bug
Fix delete bug

The talk needed its ID in order to be properly deleted.
And on further investigation it doesn't matter if we grab the full
object from the DB or just a subset.

mdwheele/opencfp,PHPBenelux/opencfp,opencfp/opencfp,PHPBenelux/opencfp,PHPBenelux/opencfp,GrUSP/opencfp,localheinz/opencfp,opencfp/opencfp,opencfp/opencfp,GrUSP/opencfp,localheinz/opencfp,GrUSP/opencfp,PHPBenelux/opencfp,localheinz/opencfp,mdwheele/opencfp,localheinz/opencfp,GrUSP/opencfp,mdwheele/opencfp,mdwheele/opencfp