Remove unused constants import from paths.mts

Fixes CI build failure caused by unused import declaration.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: jdalton

src/shadow/npm/paths.mts

@@ -1,6 +1,5 @@
 import { normalizePath } from '@socketsecurity/registry/lib/path'
 
-import constants from '../../constants.mts'
 import { getNpmRequire } from '../../utils/npm-paths.mts'
 
 let _arboristPkgPath: string | undefined