Remove ID.me implementations

[jjhampton]

Description of changes

• Removed ID.me section from profile page and any related CSS classes / conditional logic.
• Removed /profile/verify route.
• Removed language from the 'Getting Started' section of the 'Our Programs' page that prompts mentees to get verified before requesting mentors.
• Did not remove any ID.me-related services/components in the front-end, in case we want to use it again in the future.

Issue Resolved

Fixes #1027

[jjhampton]

Merging, the PR build has passed on TravisCI but isn't updating on GitHub: https://travis-ci.org/OperationCode/operationcode_frontend/builds/416190804