chore: remove unused root package.json and lockfile

[randygrok]

What

Deletes the root package.json (sun-valley) and package-lock.json.

Why

These were added by an accidental npm init -y + npm install viem in the client impl commit (933d335). Evidence they are unused:

• main points to index.js which does not exist
• test script is the literal npm init stub (echo "Error: no test specified" && exit 1)
• CI runs npm only inside clients/ (unit.yml working-directory: clients, e2e.yml cd clients), never at the repo root
• No Dockerfile / Makefile / scripts / workspace (pnpm/turbo/lerna/nx) config references it
• The real npm code lives in clients/ (@evstack/evnode-viem) and bin/sponsor-service/, each with its own package.json

Removing the orphan manifest also stops spurious Dependabot security PRs/alerts (e.g. #fefd86145f) against dependencies nothing in the repo actually uses.

Note

This supersedes the Dependabot npm bump PR, which was only touching this dead manifest.

Summary by CodeRabbit

• Chores
  • Removed project build configuration metadata and package dependencies.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 39dcfc34-4a27-4330-9c7c-63ded9c43d0d

📥 Commits

Reviewing files that changed from the base of the PR and between c646132 and 734c6dd.

⛔ Files ignored due to path filters (1)

• package-lock.json is excluded by !**/package-lock.json

📒 Files selected for processing (1)

• package.json

💤 Files with no reviewable changes (1)

• package.json

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📝 Walkthrough

Walkthrough

The entire package.json file was deleted. This removes all npm package metadata including the package name, version, description, entry points, license type, and the viem dependency declaration. No replacement configuration is present.

Changes

Cohort / File(s)	Summary
Package Configuration Removal package.json	File completely deleted, removing npm metadata and the viem dependency (^2.45.0).

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~45 minutes

Poem

🐰 A package once lived in this repo with care,
With viem and metadata floating in air,
But now it's been deleted, gone without trace—
Did they move it elsewhere, or leave this place?
Questions abound in this deletion affair! 📦✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately and concisely describes the main change: removing an unused root package.json and lockfile.
Description check	✅ Passed	The description comprehensively explains what was deleted, why it was unused, and provides clear evidence. It addresses the Type of Change (chore/refactoring) and includes relevant context.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/remove-unused-root-package

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