Drop setuid from chrome-sandbox and keep Obsidian's tests in its package

Chromium sandboxes through unprivileged user namespaces on Arch-family
kernels, so the setuid-root helper is unnecessary. The watcher tests now run
from check() as checksummed package sources, leaving tests/ and the shared
Tests workflow untouched.

tests/obsidian-upstream.py

@@ -1,47 +0,0 @@
-#!/usr/bin/python3
-import importlib.util
-from pathlib import Path
-import unittest
-
-path = Path(__file__).resolve().parents[1] / 'pkgbuilds/obsidian/.omarchy/upstream.py'
-spec = importlib.util.spec_from_file_location('obsidian_upstream', path)
-module = importlib.util.module_from_spec(spec)
-spec.loader.exec_module(module)
-
-
-def release(version, **extra):
-    return dict(tag_name='v' + version, draft=False, prerelease=False,
-                published_at='2026-09-23T00:00:00Z', assets=[{
-                    'name': f'obsidian-{version}-arm64.tar.gz',
-                    'digest': 'sha256:' + 'a' * 64,
-                    'browser_download_url': f'https://github.com/obsidianmd/obsidian-releases/releases/download/v{version}/obsidian-{version}-arm64.tar.gz'
-                }], **extra)
-
-
-class DesktopReleaseTests(unittest.TestCase):
-    def test_mobile_only_and_preview_ignored(self):
-        mobile = release('2.0.0'); mobile['assets'] = [{'name': 'Obsidian.apk'}]
-        preview = release('3.0.0'); preview['prerelease'] = True
-        draft = release('4.0.0'); draft['draft'] = True
-        self.assertEqual(module.select([mobile, preview, draft, release('1.13.7')])['pkgver'], '1.13.7')
-
-    def test_numeric_version_order(self):
-        self.assertEqual(module.select([release('1.9.0'), release('1.13.7')])['pkgver'], '1.13.7')
-
-    def test_bad_newest_digest_fails_without_falling_back(self):
-        newest = release('2.0.0'); newest['assets'][0]['digest'] = None
-        with self.assertRaises(ValueError):
-            module.select([release('1.13.7'), newest])
-
-    def test_changed_url_rejected(self):
-        row = release('1.13.7'); row['assets'][0]['browser_download_url'] = 'https://example.org/foreign'
-        with self.assertRaises(ValueError): module.select([row])
-
-    def test_missing_or_duplicate_installer_rejected(self):
-        with self.assertRaises(ValueError): module.select([])
-        row = release('1.13.7'); row['assets'] *= 2
-        with self.assertRaises(ValueError): module.select([row])
-
-
-if __name__ == '__main__':
-    unittest.main()