cleanup: remote (skill, v5.9.4 follow-on)

Drop unused readFileSync import in remote.ts — orphaned since v5.3.0
introduction and never referenced. Behavior identical.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: edtadros

src/lib/remote.ts

@@ -10,7 +10,7 @@
  * - Skip-and-flag for auto sync; AI-mediated resolution for conflicts
  */
 
-import { existsSync, statSync, mkdirSync, writeFileSync, unlinkSync, readFileSync } from "fs";
+import { existsSync, statSync, mkdirSync, writeFileSync, unlinkSync } from "fs";
 import os from "os";
 import * as path from "path";
 import { GnosysDB, DbMemory } from "./db.js";