Remove duplicate memory allocation failure error messages.

Will another background information be relevant for the final commit message?

ps3: Delete an error message for a failed memory allocation in two functions
https://lore.kernel.org/linuxppc-dev/58807b28-b2b9-7e77-11b8-21db43c9d5ba@users.sourceforge.net/ (local)
https://lore.kernel.org/patchwork/patch/864037/
https://lkml.org/lkml/2017/12/16/107

Regards,
Markus