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.

index.toml

@@ -4,14 +4,6 @@ hash-format = "sha256"
 file = "config/akashictome-common.toml"
 hash = "4e479c86ddfec0c5e28f07034f033a10abae404309f38ccc4bfc15da9de2dfa2"
 
-[[files]]
-file = "config/alexsmobs-common.toml"
-hash = "bc47ee67032ceab8b2b408819ce9b268812f37da8f13b9b7efeae0deed607c4b"
-
-[[files]]
-file = "config/crittersandcompanions-common.json5"
-hash = "1ac5a9b392b3aa980abe86b37aa8a9853e91c02cd18f8a1bceea0d08fe3f10c4"
-
 [[files]]
 file = "config/defaultoptions/extra/config/DistantHorizons.toml"
 hash = "8949bf3c7a43df7a7ae384213db0985425db3559219c29cb63eaef45c7962dcc"
@@ -44,10 +36,6 @@ hash = "9b75828543ed2b8cc5804eabecdc28262297a90d6f0e8e771d64ff779a69e3c9"
 file = "config/defaultoptions/options.txt"
 hash = "62034e0589087dab02d1a15192ad313a57f907d5ee9ebbf8853151f7831851a1"
 
-[[files]]
-file = "config/fowlplay.json5"
-hash = "09ad767a358310e9d38e632ba0e670b0afd1554c162eadb6928d106df17b66c3"
-
 [[files]]
 file = "config/modernfix-mixins.properties"
 hash = "ca92e91a2d856d42e4a5b1ba1900fbed0e942bcbeddd75c0195a2375ade75695"
@@ -618,11 +606,6 @@ file = "mods/fishermans-haven.pw.toml"
 hash = "d72a60c2053f10a447bdd05577674eeb8d0253a3ca02cb40776e063db556dda2"
 metafile = true
 
-[[files]]
-file = "mods/flerovium.pw.toml"
-hash = "9ab20de2d63037f055d6b614013389e0198068bab536dfd62eebd913e5222fe1"
-metafile = true
-
 [[files]]
 file = "mods/fowlplay.pw.toml"
 hash = "549e72a053da13a50404bd0901b75ce25c6045e778d5a89afcf58e9b5e1945f5"