preloader: remove unused top-level timestamp initialization in constants

[Copilot]

The preloader constants module executed a top-level performance.now() call (loadStart) that is unused and can interfere with compile-time analysis environments (e.g. Wizer).
This change removes that eager runtime access while preserving existing preloader behavior.

• Problem scope

  • packages/qwik/src/core/preloader/constants.ts exported loadStart = performance.now() at module load time.
  • loadStart is not consumed anywhere in the preloader/core codepath.

• Change made

  • Removed the unused loadStart export from preloader constants.
  • Kept all other constants and preloader logic unchanged.

• Behavioral impact

  • Eliminates an unnecessary top-level high-resolution timer read.
  • No runtime behavior changes expected, since the removed symbol had no references.

// before
export const loadStart = performance.now();

// after
// removed (unused)

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Latest commit: 8919a1e

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[Copilot]

Pull request overview

Removes the unused top-level loadStart = performance.now() export from the preloader constants module. Eliminates an eager runtime timer read that has no consumers and can interfere with compile-time analysis tools like Wizer.

Changes:

• Delete the loadStart export and its // Global state comment from packages/qwik/src/core/preloader/constants.ts.

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commit: 8919a1e