revert(perf): remove Flerovium and the spawn tuning

Run 3 benches (analysis/client-perf/RESULTS-proxy.md): Flerovium's run-2
win did not reproduce (S1 slightly worse, S3 within noise), and the
moderate spawn tuning (d80f85b, 8e8483d) left total mob counts unchanged
across 4 runs per config. Owner approved removing both. The mods now
regenerate their default spawn configs.

config/alexsmobs-common.toml

@@ -1,13 +0,0 @@
-# Onion MC spawn tuning (analysis/client-perf/SPAWN-TUNING.md). Partial file: NeoForge
-# fills every other key with its default on load. Halves only the common mobs that are
-# heavy by weight x hard-coded group size; rare mobs keep their defaults.
-[spawning]
-	gazelleSpawnWeight = 20
-	capuchinMonkeySpawnWeight = 14
-	elephantSpawnWeight = 15
-	straddlerSpawnWeight = 35
-	rockyRollerSpawnWeight = 30
-	underminerSpawnWeight = 25
-	blobfishSpawnWeight = 15
-	mudskipperSpawnWeight = 14
-	caimanSpawnWeight = 15

config/crittersandcompanions-common.json5

@@ -1,51 +0,0 @@
-// Onion MC spawn tuning (analysis/client-perf/SPAWN-TUNING.md). Partial file: YACL keeps
-// defaults for missing keys. Each listed rule list REPLACES that mob's defaults, so every
-// biome rule of a changed mob is listed. configVersion 2 skips the v1->v2 migration.
-{
-  "configVersion": 2,
-  "spawning": {
-    "leaf_insect": [
-      {"biome_spec": "#c:is_jungle", "weight": 8, "min": 1, "max": 1},
-      {"biome_spec": "#c:is_forest", "weight": 4, "min": 1, "max": 1}
-    ],
-    "sea_bunny": [
-      {"biome_spec": "minecraft:ocean", "weight": 10, "min": 1, "max": 2},
-      {"biome_spec": "minecraft:deep_ocean", "weight": 10, "min": 1, "max": 2},
-      {"biome_spec": "minecraft:warm_ocean", "weight": 20, "min": 1, "max": 3},
-      {"biome_spec": "minecraft:lukewarm_ocean", "weight": 10, "min": 1, "max": 3},
-      {"biome_spec": "minecraft:deep_lukewarm_ocean", "weight": 10, "min": 1, "max": 3}
-    ],
-    "dragonfly": [
-      {"biome_spec": "#c:is_river", "weight": 4, "min": 1, "max": 1},
-      {"biome_spec": "#c:is_swamp", "weight": 5, "min": 1, "max": 1},
-      {"biome_spec": "#c:is_lush", "weight": 6, "min": 1, "max": 1}
-    ],
-    "ladybug": [
-      {"biome_spec": "#c:is_forest", "weight": 4, "min": 1, "max": 3},
-      {"biome_spec": "#c:is_lush", "weight": 6, "min": 1, "max": 2},
-      {"biome_spec": "#c:is_floral", "weight": 7, "min": 1, "max": 2}
-    ],
-    "stag_beetle": [
-      {"biome_spec": "#c:is_forest", "weight": 3, "min": 1, "max": 2},
-      {"biome_spec": "#c:is_lush", "weight": 6, "min": 1, "max": 2}
-    ],
-    "roly_poly": [
-      {"biome_spec": "#c:is_forest", "weight": 3, "min": 1, "max": 3},
-      {"biome_spec": "#c:is_lush", "weight": 6, "min": 1, "max": 2},
-      {"biome_spec": "#c:is_swamp", "weight": 6, "min": 1, "max": 2}
-    ],
-    "snail": [
-      {"biome_spec": "#c:is_forest", "weight": 3, "min": 1, "max": 2},
-      {"biome_spec": "#c:is_lush", "weight": 5, "min": 1, "max": 2},
-      {"biome_spec": "#c:is_swamp", "weight": 6, "min": 1, "max": 2}
-    ],
-    "stick_bug": [
-      {"biome_spec": "#c:is_forest", "weight": 3, "min": 1, "max": 2},
-      {"biome_spec": "#c:is_lush", "weight": 6, "min": 1, "max": 2}
-    ],
-    "weevil": [
-      {"biome_spec": "#c:is_forest", "weight": 3, "min": 1, "max": 3},
-      {"biome_spec": "#c:is_lush", "weight": 6, "min": 1, "max": 2}
-    ]
-  }
-}

config/fowlplay.json5

@@ -1,13 +0,0 @@
-// Onion MC spawn tuning (analysis/client-perf/SPAWN-TUNING.md). Partial file: YACL keeps
-// defaults for every missing key and re-saves. Targets the waterfowl/gull/sparrow flocks
-// behind Fowl Play #214; songbirds and raptors keep their defaults.
-{
-  "duckSpawnWeight": 2,
-  "duckMaxGroupSize": 4,
-  "gooseSpawnWeight": 2,
-  "gooseMaxGroupSize": 3,
-  "gullSpawnWeight": 3,
-  "gullMaxGroupSize": 5,
-  "sparrowSpawnWeight": 12,
-  "sparrowMaxGroupSize": 4
-}