Remove biography from the onboarding page

[jlnat]

The biography on the onboarding page was not very useful, as the user has no access to the linking any ANET objects by that point.

Closes AB#1391

New user changes

• New users will no longer be able to fill in any biography on the onboarding page

User changes

• None

Superuser changes

• None

Admin changes

• None

System admin changes

• application.yml or anet-dictionary.yml needs change
• db needs migration
• documentation has changed
• graphql schema has changed

Checklist

• described the user behavior in PR body
• referenced/updated all related issues
• commits follow a repo#issue: Title title format and these 7 rules
• commits have a clean history, otherwise PR may be squash-merged
• added and/or updated unit tests
• added and/or updated e2e tests
• added and/or updated data migrations
• updated documentation
• resolved all build errors and warnings
• opened debt issues for anything not resolved here