Remove user UID/GID

Author: adam-fowler

src/swift/.devcontainer/devcontainer.json

@@ -5,8 +5,6 @@
         "ghcr.io/devcontainers/features/common-utils:2": {
             "installZsh": "false",
             "username": "vscode",
-            "userUid": "1000",
-            "userGid": "1000",
             "upgradePackages": "false"
         },
         "ghcr.io/devcontainers/features/git:1": {