Remove Meta Robots Tag as default

[amitjain213]

Is your feature request related to a problem? Please describe.
Wanna remove as default on pages as The meta robots field is intended to specify which pages NOT to block. If a page does not need to be blocked then the field does not need to be present on the page. It is assumed by a bot that if the NOINDEX is missing then by default it should be indexed.

Describe the solution you'd like
should not be included as default.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

Any links to Google or http://schema.org/ to support to validity in terms of SEO will be a great help.