fix(ts): remove unused removeGitignoreEntries import (TS6133)

Author: erudenko

tools/claudeup-core/src/__tests__/integration/conventions-integration.test.ts

@@ -32,7 +32,6 @@ import { tmpdir } from 'node:os';
 import {
   // Gitignore operations
   ensureGitignoreEntries,
-  removeGitignoreEntries,
   checkGitignoreEntries,
   // CLAUDE.md operations
   parseClaudeMdSections,