New: `no-unused-modules` rule - minor refactoring
New: `no-unused-modules` rule - minor refactoring

Signed-off-by: René Fermann <ba6a9fcdcaa0c9965923e8e96a4920f9bad1456b@gmx.de>

benmosher/eslint-plugin-import,benmosher/eslint-plugin-import,benmosher/eslint-plugin-import