Remove dev-dep eslint-plugin-standard

https://github.com/adobe/aio-e2e-tests/blob/66afa8757608c99497afbcdd35d961640287593f/package.json#L43C22-L43C22

## warning

npm WARN deprecated eslint-plugin-standard@5.0.0: standard 16.0.0 and eslint-config-standard 16.0.0 no longer require the eslint-plugin-standard package. You can remove it from your dependencies with `npm rm eslint-plugin-standard`. More info here: https://github.com/standard/standard/issues/1316

Start with package.json at line 43 and inspect the surrounding devDependencies. Use the warning's suggested npm rm eslint-plugin-standard command, then confirm package.json no longer lists the dependency and the deprecation warning is resolved.

Written by the indexing model from the issue text.