Deprecate unused backpack js functions

Requirements

• 2 different Badgr.io US accounts
• Outgoing server configured (mailcacher or similar)
• ngrok or similar (for having a public URL in your Moodle instance).
• Enable Moodle debugging (DEVELOPER MODE).

 Setup backpack

1. In "Site administration / Badges / Manage backpacks", edit "https://badgr.io" backpack and:
   1. Enable "Include authentication details with the backpack".
   2. Set the Badge issuer email address and password with one of the Badgr accounts.

Testing scenario 1: Create badges

1. Login as admin.
2. Go to "Site administration | Badges | Add a new badge" and create a badge at site level ("Badge 1").
3. Check no deprecation warning is displayed.
4. Add criteria to the badge so it can be manually issued by role.
5. Go to "Site administration | Badges | Add a new badge" and create another badge at site level ("Badge 2").
6. Add criteria to the badge so it can be manually issued by role.
7. Enable both badges.
8. Issue the badges to the admin user.
9. Go to "Site administration | Badges | Manage badges".
10. Check no deprecation warning is displayed.

Testing scenario 2: List badges

1. Go to "Dashboard / Preferences / Badges / Backpack settings"
2. Connect to Badgr using account 2 (you'll need to check the email to verify the account).
3. Check the state is set to "Connected" in the "Dashboard / Preferences / Badges / Backpack settings" page.
4. Access to admin profile page.
5. Check "Badge 1" and "Badge 2" are displayed in the "Badges" section.
6. Access to "Badge 1".
7. Check no deprecation warning is displayed.
8. Check the "Add to backpack" button is displayed.
9. Go to "Dashboard / Preferences / Badges / Manage badges".
10. Check no deprecation warning is displayed.
11. Check "Badge 1" and "Badge 2" are displayed and they have the "Add to backpack" icon.