proc: remove duplicate compile-time fortify reference

This is no longer needed since shim and init are now part of the main program.

Signed-off-by: Ophestra <cat@gensokyo.uk>

cmd/fpkg/proc.go

@@ -12,12 +12,18 @@ import (
 	"git.gensokyo.uk/security/fortify/internal/fmsg"
 )
 
+const compPoison = "INVALIDINVALIDINVALIDINVALIDINVALID"
+
+var (
+	Fmain = compPoison
+)
+
 func fortifyApp(config *fst.Config, beforeFail func()) {
 	var (
 		cmd *exec.Cmd
 		st  io.WriteCloser
 	)
-	if p, ok := internal.Check(internal.Fortify); !ok {
+	if p, ok := internal.Path(Fmain); !ok {
 		beforeFail()
 		fmsg.Fatal("invalid fortify path, this copy of fpkg is not compiled correctly")
 		panic("unreachable")