ships and items never have multi-stage builds.

we are going to make sure of this soon.

src/kernel/build.c

@@ -642,7 +642,6 @@ message *msg_materials_required(unit * u, order * ord,
 
 int maxbuild(const unit * u, const construction * cons)
 /* calculate maximum size that can be built from available material */
-/* !! ignores maximum objectsize and improvements... */
 {
     int c;
     int maximum = INT_MAX;

src/kernel/ship.c

@@ -328,7 +328,6 @@ int shipspeed(const ship * sh, const unit * u)
     assert(u->ship == sh);
     assert(u == ship_owner(sh));
     assert(sh->type->construction);
-    assert(sh->type->construction->improvement == NULL);  /* sonst ist construction::size nicht ship_type::maxsize */
 
     k = sh->type->range;
     if (sh->size != sh->type->construction->maxsize)
@@ -396,10 +395,6 @@ int shipcapacity(const ship * sh)
 {
     int i = sh->type->cargo;
 
-    /* sonst ist construction:: size nicht ship_type::maxsize */
-    assert(!sh->type->construction
-        || sh->type->construction->improvement == NULL);
-
     if (sh->type->construction && sh->size != sh->type->construction->maxsize)
         return 0;
 

src/move.c

@@ -847,7 +847,6 @@ static void drifting_ships(region * r)
             /* Kapitän da? Beschädigt? Genügend Matrosen?
              * Genügend leicht? Dann ist alles OK. */
 
-            assert(sh->type->construction->improvement == NULL); /* sonst ist construction::size nicht ship_type::maxsize */
             if (captain && sh->size == sh->type->construction->maxsize
                 && enoughsailors(sh, crew_skill(sh)) && cansail(r, sh)) {
                 shp = &sh->next;
@@ -1669,7 +1668,6 @@ static bool ship_ready(const region * r, unit * u, order * ord)
         return false;
     }
     if (u->ship->type->construction) {
-        assert(!u->ship->type->construction->improvement);     /* sonst ist construction::size nicht ship_type::maxsize */
         if (u->ship->size != u->ship->type->construction->maxsize) {
             cmistake(u, ord, 15, MSG_MOVE);
             return false;

src/report.c

@@ -1803,7 +1803,6 @@ nr_ship(struct stream *out, const region *r, const ship * sh, const faction * f,
     if (wrptr(&bufp, &size, bytes) != 0)
         WARN_STATIC_BUFFER();
 
-    assert(sh->type->construction->improvement == NULL);  /* sonst ist construction::size nicht ship_type::maxsize */
     if (sh->size != sh->type->construction->maxsize) {
         bytes = snprintf(bufp, size, ", %s (%d/%d)",
             LOC(f->locale, "nr_undercons"), sh->size,