* Remove eliminated schemes from NIST PQC digital signature competition

NIST announced the second round candidates on October 24, 2024:
https://groups.google.com/a/list.nist.gov/g/pqc-forum/c/khAfIZPktRE/m/bBZWmET-AAAJ

Eliminated schemes (with implementations in mupq):

 - ascon-sign
 - biscuit
 - meds
 - sphinca-a
 - tuov

None of those have dedicated implementations in pqm4.

aimer and haetae also got eliminated, but remain candidates of KPQC (https://www.kpqc.or.kr/competition.html). Let's keep them around.

* adjust README

* update mupq

* fix aimer skiplist