Remove the "canonical" link template

Problem/Motivation

This causes a crash when the module is used along side the responsive_preview module. It tries to open a canonical URL because it's defined in the entity config, however the route doesn't exist and results in a crash.

Steps to reproduce

Proposed resolution

Remove the canonical link template or implement a route for it:

entity.address_formatter.canonical:
  path: '/admin/config/address-formatter/{address_formatter}'
  defaults:
    _entity_form: 'address_formatter.edit'
    _title: 'Edit options'
  requirements:
    _permission: 'administer address formatter'
  options:
    _admin_route: TRUE

Remaining tasks

Provide issue fork.

User interface changes

N/A

API changes

N/A

Data model changes