Drop contact_* fields from dcim.Site

[jeremystretch]

Proposed Changes

Remove the following fields from the dcim.Site model:

• contact_name
• contact_phone
• contact_email

Justification

NetBox v3.1 introduced a new Contact model (see #1344), which supports the more efficient assignment of contacts to sites and other objects, obviating the need for these fields on the model.

[cs-1]

Will the upgrade script migrate existing contacts from sites to the new Contact model?

[jeremystretch]

I wasn't comfortable including an automatic migration for existing contact data, given the largely free-form nature of the fields. However, we could publish a script to take care of this for users. It would allow users to perform a "dry-run" before committing the new objects.