nilrt-safemode-ramdisk: Remove alsa uninstallation
nilrt-safemode-ramdisk: Remove alsa uninstallation

alsa packages are not installed into safemode. So, the steps to
remove alsa packages from the image are unnecessary.

Signed-off-by: Shruthi Ravichandran <db26f49c821f5e8eba3f4f30a1d200e2416b0696@ni.com>

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt