[Themes] Remove Ruby invocation from `theme dev` command

[jamesmengo]

WHY are these changes introduced?

Fixes https://github.com/Shopify/develop-advanced-edits/issues/354

WHAT is this pull request doing?

• Remove legacy flag from theme dev command
• Remove Ruby invocation in theme dev command

How to test your changes?

Post-release steps

Measuring impact

How do we know this change was effective? Please choose one:

• [ ] n/a - this doesn't need measurement, e.g. a linting rule or a bug-fix
• [ ] Existing analytics will cater for this addition
• [ ] PR includes analytics changes to measure impact

Checklist

• [ ] I've considered possible cross-platform impacts (Mac, Linux, Windows)
• [ ] I've considered possible documentation changes

[github-actions[bot]]

Thanks for your contribution!

Depending on what you are working on, you may want to request a review from a Shopify team:

• Themes: @shopify/advanced-edits
• UI extensions: @shopify/ui-extensions-cli
  • Checkout UI extensions: @shopify/checkout-ui-extensions-api-stewardship
• Hydrogen: @shopify/hydrogen
• Other: @shopify/app-inner-loop

[github-actions[bot]]

Coverage report

St.:grey_question:	Category	Percentage	Covered / Total
🟡	Statements	72.55% (+0.01% 🔼)	8417/11602
🟡	Branches	69.12% (+0.02% 🔼)	4137/5985
🟡	Functions	71.96%	2199/3056
🟡	Lines	72.82% (+0.01% 🔼)	7960/10931

Test suite run success

1925 tests passing in 873 suites.

Report generated by 🧪jest coverage report action from b981aea41c5f1e5539213dca5cb00b31313a4a43

[github-actions[bot]]

We detected some changes at either packages/*/src or packages/cli-kit/assets/cli-ruby/** and there are no updates in the .changeset. If the changes are user-facing, run "pnpm changeset add" to track your changes and include them in the next release CHANGELOG.

[nickwesselman]

/snapit

[github-actions[bot]]

🫰✨ Thanks @nickwesselman! Your snapshot has been published to npm.

Test the snapshot by intalling your package globally:

pnpm i -g @shopify/[email protected]

After installing, validate the version by running just shopify in your terminal If the versions don't match, you might have multiple global instances installed. Use which shopify to find out which one you are running and uninstall it.

[github-actions[bot]]

We detected some changes at packages/*/src and there are no updates in the .changeset. If the changes are user-facing, run "pnpm changeset add" to track your changes and include them in the next release CHANGELOG.