ifc-converter: drop test script until tests exist (#328)

The package has no test files yet. `bun test` exits 1 ("No tests found!")
and fails CI; --pass-with-no-tests isn't honored by the bun 1.3.0 pinned
in CI. Match the convention used by @pascal-app/viewer (no test script):
turbo skips the test task for packages without one. The script comes back
when real tests land.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/ifc-converter/package.json

@@ -19,7 +19,6 @@
   "scripts": {
     "build": "tsc --build",
     "dev": "tsc --build --watch",
-    "test": "bun test --pass-with-no-tests",
     "prepublishOnly": "npm run build"
   },
   "dependencies": {