Classifai/Providers/Watson/NLU.php updates

[thrijith]

Description of the Change

• Implement can_register() method for Classifai/Providers/Watson/NLU.php.
• Remove check_license_key from Classifai/Providers/Watson/NLU.php.

Alternate Designs

N/A

Benefits

• Doesn't load assets unless valid credentials exist.

Possible Drawbacks

N/A

Verification Process

• Not seeing errors after the change

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests passed.

Applicable Issues

#260

Changelog Entry

Implement can_register for NLU.
Remove unused check_license_key method.

[dinhtungdu]

@thrijith LGTM! Thanks for working on this. Can you please fix the failed workflows before merging this one?

[thrijith]

Can you please fix the failed workflows before merging this one?

@dinhtungdu it seems the failures were unrelated to the change but I've tried to fix it, please check again when you get a chance, the test failure for one was due to missing function which seems to have been removed in
96fb643#diff-f21acafec2b8e955db72543bf906557e4fa9a409d31026c84953a97c64ae0b93, so I've removed that test, please let me know if that works, thanks!

[dinhtungdu]

LGTM 🎉 . Great work @thrijith!