when and why was this hardcoded (#6289)

core/src/mindustry/ai/types/MinerAI.java

@@ -25,7 +25,7 @@ public class MinerAI extends AIController{
 
         if(mining){
             if(timer.get(timerTarget2, 60 * 4) || targetItem == null){
-                targetItem = unit.team.data().mineItems.min(i -> indexer.hasOre(i) && unit.canMine(i), i -> core.items.get(i));
+                targetItem = unit.type.mineItems.min(i -> indexer.hasOre(i) && unit.canMine(i), i -> core.items.get(i));
             }
 
             //core full of the target item, do nothing
@@ -75,4 +75,4 @@ public class MinerAI extends AIController{
             circle(core, unit.type.range / 1.8f);
         }
     }
-}
+}

core/src/mindustry/game/Teams.java

@@ -234,8 +234,6 @@ public class Teams{
         public Queue<BlockPlan> blocks = new Queue<>();
         /** The current command for units to follow. */
         public UnitCommand command = UnitCommand.attack;
-        /** Target items to mine. */
-        public Seq<Item> mineItems = Seq.with(Items.copper, Items.lead, Items.titanium, Items.thorium);
 
         /** Quadtree for all buildings of this team. Null if not active. */
         @Nullable
@@ -370,4 +368,4 @@ public class Teams{
             '}';
         }
     }
-}
+}

core/src/mindustry/type/UnitType.java

@@ -88,6 +88,8 @@ public class UnitType extends UnlockableContent{
     public BlockFlag[] targetFlags = {null};
     /** targetFlags, as an override for "non-AI" teams. By default, units of this type will rush the core. */
     public BlockFlag[] playerTargetFlags = {BlockFlag.core, null};
+    /** Target items to mine. Used in MinerAI */
+    public Seq<Item> mineItems = Seq.with(Items.copper, Items.lead, Items.titanium, Items.thorium);
 
     public Color outlineColor = Pal.darkerMetal;
     public int outlineRadius = 3;
@@ -965,4 +967,4 @@ public class UnitType extends UnlockableContent{
 
     //endregion
 
-}
+}