'fraid not, all modes use the same loading system, if you wanted it out of the championship you'd have to remove it completely. You have to have 17 circuits too, so you'd need to replace it with a different track
That's why Boromo Superveloz is included, because GP4 makes you have 17 circuits and there were only 16 tracks used in 1993:
1 Kyalami
2 Interlagos
3 Donington
4 Imola
5 Barcelona
6 Monte-Carlo
7 Montreal
8 Magny-Cours
9 Silverstone
10 Hockenheimring
11 Hungaroring
12 Spa
13 Monza
14 Estoril
15 Suzuka
16 Adelaide
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"Anything can happen in Grand Prix racing, and it usually does."
"The lead car is unique, except for the one behind it which is identical."