Move heal locations data to their associated map.json (#2034)

data/maps/LittlerootTown/map.json

@@ -264,5 +264,17 @@
       "player_facing_dir": "BG_EVENT_PLAYER_FACING_ANY",
       "script": "LittlerootTown_EventScript_MaysHouseSign"
     }
+  ],
+  "heal_locations": [
+    {
+      "id": "HEAL_LOCATION_LITTLEROOT_TOWN_BRENDANS_HOUSE",
+      "x": 5,
+      "y": 9
+    },
+    {
+      "id": "HEAL_LOCATION_LITTLEROOT_TOWN_MAYS_HOUSE",
+      "x": 14,
+      "y": 9
+    }
   ]
 }