Remove unused readFileSync import from test file

Author: Awad-de

src/commands/test.run.spec.ts

@@ -5,7 +5,7 @@
  * sleep injection is wired through `TestDeps.sleep` to avoid real delays.
  */
 
-import { mkdirSync, mkdtempSync, readFileSync, writeFileSync } from 'node:fs';
+import { mkdirSync, mkdtempSync, writeFileSync } from 'node:fs';
 import { tmpdir } from 'node:os';
 import { join } from 'node:path';
 import type { Command } from 'commander';