md/raid1: don't free conf on raid0_run failure

The core md code calls the ->free method which already frees conf.

Fixes: 07f1a685

 ("md/raid1: fail run raid1 array when active disk less than one")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240613084839.1044015-4-hch@lst.de


Signed-off-by: Jens Axboe <axboe@kernel.dk>