I need to remove the Standard Record Type Field from Library Page Layout. I had record types earlier which I have deactivated and even deleted but still the Master Record Type is present on the page layout of Content/Library when we try to contribute a file.

Methods I have tried :

I have deleted the Record Types. Still the field is available.
I have deactivated the record type. Still I was able to find that field.
I even tried to remove the record type access to the profile. Still the field was there.