Remove in PIV driver need for aid_file
Remove in PIV driver need for aid_file

Remove aid_file and aidfile variables in card-piv.c. These are not needed
as piv_select_aid parses the returned data from a SELECT AID command.

In response to e-mail from X41 group on 6/11/2018.

 On branch x41-piv-2
 Changes to be committed:
	modified:   card-piv.c

AktivCo/OpenSC,AktivCo/OpenSC,OpenSC/OpenSC,metsma/OpenSC,mouse07410/OpenSC,dengert/OpenSC,Jakuje/OpenSC,CardContact/OpenSC,mouse07410/OpenSC,frankmorgner/OpenSC,metsma/OpenSC,Jakuje/OpenSC,OpenSC/OpenSC,rickyepoderi/OpenSC,OpenSC/OpenSC,LudovicRousseau/OpenSC,dengert/OpenSC,hhonkanen/OpenSC,hongquan/OpenSC-main,viktorTarasov/OpenSC-SM,viktorTarasov/OpenSC-SM,philipWendland/OpenSC,mouse07410/OpenSC,LudovicRousseau/OpenSC,LudovicRousseau/OpenSC,Jakuje/OpenSC,frankmorgner/OpenSC,fabled/OpenSC,hongquan/OpenSC-main,hhonkanen/OpenSC,frankmorgner/OpenSC,dengert/OpenSC,philipWendland/OpenSC,frankmorgner/OpenSC,philipWendland/OpenSC,hhonkanen/OpenSC,Jakuje/OpenSC,fabled/OpenSC,rickyepoderi/OpenSC,hongquan/OpenSC-main,AktivCo/OpenSC,CardContact/OpenSC,metsma/OpenSC,CardContact/OpenSC,fabled/OpenSC,fabled/OpenSC,viktorTarasov/OpenSC-SM,rickyepoderi/OpenSC