package.json: Remove onlyBuiltDependencies

Not necessary

References:
  biomejs/biome#4854
  evanw/esbuild#4085 (comment)

Author: simnalamburt

package.json

@@ -34,8 +34,5 @@
   "module": "dist/slate-irc-parser.modern.mjs",
   "types": "dist/index.d.ts",
   "files": ["dist/*"],
-  "packageManager": "pnpm@10.8.1",
-  "pnpm": {
-    "onlyBuiltDependencies": ["@biomejs/biome", "esbuild"]
-  }
+  "packageManager": "pnpm@10.8.1"
 }