build-scripts/fnsince.pl: Remove SDL2-specific fixup.

build-scripts/fnsince.pl

@@ -88,11 +88,6 @@ foreach my $release (@releases) {
     close(PIPEFH);
 }
 
-# these are incorrect in the dynapi header, because we forgot to add them
-#  until a later release, but are available in the older release.
-$funcs{'SDL_WinRTGetFSPathUNICODE'} = '2.0.3';
-$funcs{'SDL_WinRTGetFSPathUTF8'} = '2.0.3';
-
 if (not defined $wikipath) {
     foreach my $release (@releases) {
         foreach my $fn (sort keys %funcs) {