chore: drop duplicate pnpm-lock.yaml

Two lockfiles existed (package-lock.json and pnpm-lock.yaml). Keep the
canonical npm package-lock.json and remove the pnpm one to avoid divergent
dependency resolution.

pnpm-lock.yaml

@@ -1,43 +0,0 @@
-lockfileVersion: '9.0'
-
-settings:
-  autoInstallPeers: true
-  excludeLinksFromLockfile: false
-
-importers:
-
-  .:
-    devDependencies:
-      playwright:
-        specifier: ^1.50.0
-        version: 1.60.0
-
-packages:
-
-  [email protected]:
-    resolution: {integrity: sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==}
-    engines: {node: ^8.16.0 || ^10.6.0 || >=11.0.0}
-    os: [darwin]
-
-  [email protected]:
-    resolution: {integrity: sha512-9bW6zvX/m0lEbgTKJ6YppOKx8H3VOPBMOCFh2irXFOT4BbHgrx5hPjwJYLT40Lu+4qtD36qKc/Hn56StUW57IA==}
-    engines: {node: '>=18'}
-    hasBin: true
-
-  [email protected]:
-    resolution: {integrity: sha512-hheHdokM8cdqCb0lcE3s+zT4t4W+vvjpGxsZlDnikarzx8tSzMebh3UiFtgqwFwnTnjYQcsyMF8ei2mCO/tpeA==}
-    engines: {node: '>=18'}
-    hasBin: true
-
-snapshots:
-
-  [email protected]:
-    optional: true
-
-  [email protected]: {}
-
-  [email protected]:
-    dependencies:
-      playwright-core: 1.60.0
-    optionalDependencies:
-      fsevents: 2.3.2