Remove "primary" option from schema builder argument $options as it is not...

Remove "primary" option from schema builder argument $options as it is not used anymore and triggers an exception

See https://github.com/doctrine/dbal/commit/138eb85234a1faeaa2e6a32cd7bcc66bb51c64e8#diff-300f55366adb50a32a40882ebdc95c163b141f64cba5f45f20bda04a907b3eb3L82



Signed-off-by: Morris Jobke <hey@morrisjobke.de>