revert scholo dungeon-replacement; restore kg 4-floor maps

The Atlas single-room override was too low-res and too lossy (no kg packs/patrols, only 14 hand-curated bosses). Better to keep kg's 4-floor layout and figure out per-floor edge cases as we go.

dungeon_replacements is left in place as a mechanism but with no entries; we'll use it only when we have a high-resolution alternative map.

data/ascension_overrides.json

@@ -1,17 +1,8 @@
 {
   "_comment": "Ascension-specific corrections to the upstream kg / AtlasLoot data. Each entry overrides where an enemy/extra is rendered. Match by tile_key + name (case-insensitive substring). pos is in kg pixel space (z=4 stitched image, 6144x4096). kg_floor_id picks the floor (omit if the dungeon is single-floor).",
 
-  "_dungeon_replacements_comment": "When the kg map is the wrong layout for Ascension (e.g. retail/Cata layout vs classic), replace the entire dungeon's map with one we author manually. Coords are in the new map's pixel space (0..width, 0..height). Bosses come from AtlasLoot's per-dungeon entries with cords; pinType=dungeonskull → cls=3, pinType=None → cls=5 (rare).",
-  "dungeon_replacements": {
-    "scholomance": {
-      "image": "maps/scholomance.webp",
-      "width": 2048,
-      "height": 2048,
-      "atlasloot_id": "Scholomance",
-      "label": "Scholomance",
-      "note": "kg ships only the Cata 4-floor layout; Ascension uses the classic single-room layout. Map is Atlas-addon BLP upscaled to 2048."
-    }
-  },
+  "_dungeon_replacements_comment": "When the kg map is the wrong layout for Ascension (e.g. retail/Cata layout vs classic), replace the entire dungeon's map with one we author manually. Coords are in the new map's pixel space (0..width, 0..height). Bosses come from AtlasLoot's per-dungeon entries with cords.",
+  "dungeon_replacements": {},
 
   "overrides": [
     {