aes1660: remove unneeded lowering of bz3_threshold
aes1660: remove unneeded lowering of bz3_threshold

Since 5 scans for enroll was introduced it's not necessary to lower
bz3_threshold anymore, there's a good probability that scan to verify matches
with at least one enrolled sample.

jipumarino/libfprint,payden/libfprint,rmarku/libfprint,PDXostc/libfprint,micw/libfprint,iafilatov/libfprint,zemen/libfprint,zemen/libfprint,abhishekgahlot/libfprint,ccsystems/libfprint,sbambrough/libfprint_extended,zOrg1331/libfprint,hyperair/fprint-bsapi,Gnate/libfprint,sbambrough/libfprint_extended,rmarku/libfprint,hyperair/fprint-bsapi,ccsystems/libfprint,abhishekgahlot/fprint-bsapi,jipumarino/libfprint,payden/libfprint,zOrg1331/libfprint,abhishekgahlot/libfprint,freedesktop-unofficial-mirror/libfprint__libfprint,payden/libfprint,abhishekgahlot/libfprint,freedesktop-unofficial-mirror/libfprint__libfprint,anarsoul/libfprint,Gnate/libfprint,PDXostc/libfprint,abhishekgahlot/fprint-bsapi,freedesktop-unofficial-mirror/libfprint__libfprint,jipumarino/libfprint,PDXostc/libfprint,micw/libfprint,zOrg1331/libfprint,micw/libfprint,sbambrough/libfprint_extended,hyperair/fprint-bsapi,ccsystems/libfprint,rmarku/libfprint,zemen/libfprint,abhishekgahlot/fprint-bsapi,Gnate/libfprint,anarsoul/libfprint