chore: remove old code for revamp prep

fabric/src/main/resources/data/joy/worldgen/structure/bii_dome.json

@@ -1,15 +0,0 @@
-{
-  "type":"jigsaw",
-  "biomes": "minecraft:plains",
-  "step": "surface_structures",
-  "spawn_overrides": {},
-  "terrain_adaptation": "beard_thin",
-  "start_pool": "joy:bii_dome",
-  "size": 1,
-  "start_height": {
-    "absolute": 0
-  },
-  "project_start_to_heightmap": "WORLD_SURFACE_WG",
-  "max_distance_from_center": 80,
-  "use_expansion_hack": false
-}

fabric/src/main/resources/data/joy/worldgen/structure_set/bii_dome.json

@@ -1,14 +0,0 @@
-{
-  "structures": [
-    {
-      "structure": "joy:bii_dome",
-      "weight": 1
-    }
-    ],
-  "placement": {
-  "type": "minecraft:random_spread",
-    "spacing": 5,
-    "separation": 2,
-    "salt": 1545207409
-  }
-}

fabric/src/main/resources/data/joy/worldgen/template_pool/bii_dome.json

@@ -1,14 +0,0 @@
-{
-  "fallback": "minecraft:empty",
-  "elements": [
-    {
-      "weight": 1,
-      "element": {
-        "element_type": "minecraft:single_pool_element",
-        "location": "joy:dome_bii_plains",
-        "projection": "rigid",
-        "processors": "minecraft:empty"
-      }
-    }
-  ]
-}