Checking PR #30090: openthread-br: drop luci-app-openthread, moved to luci repo (Makefile Audit Profile)

Commit 262842c - openthread-br: drop luci-app-openthread, moved to luci repo:

✅ Makefile contains valid assignment operators and no spaces after ':='
✅ Makefile blocks contain valid indentation (spaces for metadata/description, tabs for build/install recipes)
✅ Makefile does not reuse PKG_NAME in call, define, or eval lines
✅ File additions contain clean UNIX (LF) line termination
✅ All modified files contain a trailing newline

Package Release Audit:

✅ Package net/openthread-br version unchanged, but PKG_RELEASE bumped from '2' to '3'