Remove dev-dep eslint-plugin-standard

[shazron]

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: standard/standard#1316