python: Drop python2 bbappend recipe.
python: Drop python2 bbappend recipe.

Python2 is no longer supported upstream.

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

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