get_normalplane is unnecessary

src/spells.c

@@ -3146,7 +3146,7 @@ static int sp_chaossuction(castorder * co)
     unit *mage = co->magician.u;
     int cast_level = co->level;
 
-    if (getplane(r) != get_normalplane()) {
+    if (rplane(r)) {
         /* Der Zauber funktioniert nur in der materiellen Welt. */
         cmistake(mage, co->order, 190, MSG_MAGIC);
         return 0;
@@ -5436,8 +5436,9 @@ int sp_fetchastral(castorder * co)
     region *rt = co_get_region(co);          /* region to which we are fetching */
     region *ro = NULL;            /* region in which the target is */
 
-    if (rplane(rt) != get_normalplane()) {
-        ADDMSG(&mage->faction->msgs, msg_feedback(mage, co->order, "error190", ""));
+    if (rplane(rt)) {
+        /* Der Zauber funktioniert nur in der materiellen Welt. */
+        cmistake(mage, co->order, 190, MSG_MAGIC);
         return 0;
     }
 

src/teleport.c

@@ -96,8 +96,7 @@ region_list *astralregions(const region * r, bool(*valid) (const region *))
 
 region *r_standard_to_astral(const region * r)
 {
-    if (rplane(r) != get_normalplane())
-        return NULL;
+    assert(!rplane(r));
     return tpregion(r);
 }
 
@@ -109,9 +108,9 @@ region *r_astral_to_standard(const region * r)
     assert(is_astral(r));
     x = (r->x - TE_CENTER_X) * TP_DISTANCE;
     y = (r->y - TE_CENTER_Y) * TP_DISTANCE;
-    pnormalize(&x, &y, get_normalplane());
+    pnormalize(&x, &y, NULL);
     r2 = findregion(x, y);
-    if (r2 == NULL || rplane(r2) != get_normalplane())
+    if (r2 == NULL || rplane(r2))
         return NULL;
 
     return r2;
@@ -168,11 +167,6 @@ void spawn_braineaters(float chance)
     }
 }
 
-plane *get_normalplane(void)
-{
-    return NULL;
-}
-
 bool is_astral(const region * r)
 {
     plane *pl = get_astralplane();

src/teleport.h

@@ -31,7 +31,6 @@ extern "C" {
     extern bool inhabitable(const struct region *r);
     extern bool is_astral(const struct region *r);
     extern struct plane *get_astralplane(void);
-    extern struct plane *get_normalplane(void);
 
     void create_teleport_plane(void);
     void set_teleport_plane_regiontypes(void);