Deprecate :not selector

[vidya-ram]

Deprecate :not selector

Few of the instances where :not selector in used

1. https://github.com/hasgeek/baseframe/blob/master/baseframe/static/js/baseframe-bootstrap.js#L6
2. https://github.com/hasgeek/baseframe/blob/master/baseframe/static/js/baseframe-bootstrap.js#L6