8l: remove unneeded windows check

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/3691042

src/cmd/ld/data.c

@@ -166,8 +166,7 @@ relocsym(Sym *s)
 			continue;
 
 		if(r->sym != S && r->sym->type == SDYNIMPORT)
-			if (thechar != '8' || HEADTYPE != 10) // Windows PE supports relocation references to dynamic import symbols
-				diag("unhandled relocation for %s (type %d rtype %d)", r->sym->name, r->sym->type, r->type);
+			diag("unhandled relocation for %s (type %d rtype %d)", r->sym->name, r->sym->type, r->type);
 
 		if(r->sym != S && !r->sym->reachable)
 			diag("unreachable sym in relocation: %s %s", s->name, r->sym->name);