feat : remove legacy feature

package.json

@@ -15,7 +15,6 @@
     "db:generate": "drizzle-kit generate",
     "db:migrate": "bun scripts/migrate.ts",
     "db:studio": "drizzle-kit studio",
-    "db:seed": "bun scripts/seed-templates.ts",
     "import:guides": "bun scripts/import-google-guides.ts",
     "worker:discord": "bun backend/discord.ts",
     "worker:outbox": "bun scripts/outbox-worker.ts"
@@ -39,7 +38,6 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
-    "decimal.js": "^10.6.0",
     "discord.js": "^14.27.0",
     "drizzle-orm": "^0.45.2",
     "embla-carousel-react": "^8.6.0",