Remove deprecated WP_Auth0_Api_Client methods

[joshcanhelp]

Changes

This is a potential breaking change for developers!

Remove all deprecated WP_Auth0_Api_Client methods:

• get_info_headers()
• get_token()
• get_client_token()
• get_user_info()
• get_user()
• get_client()
• update_client()
• create_rule()
• delete_rule()
• get_connection()
• update_user()
• GetConsentScopestoShow()
• update_guardian()
• ro()
• validate_user_token()
• search_users()
• resend_verification_email()
• create_user()
• search_clients()
• get_current_user()
• delete_connection()
• delete_user_mfa()
• change_password()
• link_users()

Note to reviewers: All additions in the changeset are docblocks.

[lbalmaceda]

I see a bunch of "helper" methods that are public. I suggest you check whether they require to be public or you can lower the visibility, so that in the future you could make changes to them without breaking anyone or needing to deprecate methods.

[joshcanhelp]

@lbalmaceda - Good point. I started down the road of improving this class but it made for a very confusing diff so I wanted to clean it up first.