ALSA: pcmtest: Remove redundant definitions

Remove redundant definitions of DEVNAME and CARD_NAME, as they're not
useful. The former is not used anywhere, and the latter is used only
in module parameters descriptions.

Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Link: https://lore.kernel.org/r/20230804110740.9867-2-ivan.orlov0322@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>