fix(package): remove dead browser session commands

[John-David Dalton (jdalton)]

LLM Description written by HARNESS:Codex:GPT-6

Summary

• Remove browser session commands that point to a missing entry script.
• Keep the existing browser advice, bridge, and setup commands.

Validation

• Focused script-path and entry-script checks pass locally.
• The citation check still needs the refreshed Wheelhouse pack.

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Note

Low Risk
Package script cleanup only; no runtime or application logic changes.

Overview
Removes four pnpm/npm scripts (browser:restart, browser:start, browser:status, browser:stop) that invoked scripts/fleet/browser/session/run.mts, which is no longer present.

Browser-related scripts that remain unchanged: browser:advice, browser:bridge, and browser:open-setup.

^{Reviewed by Cursor Bugbot for commit d4f0390. Configure here.}