[BUG]: faraday-multipart warning always printed

[dentarg]

What happened?

Since #1688 (cff7c55) octokit.rb always prints a warning if it can't load faraday-multipart. From the warning, it sounds like I don't need faraday-multipart unless I upload licenses. It would be great if the warning was only printed if I tried to do that; or that I could silence the warning somehow.

Versions

octokit.rb v9.0.0 and up

Relevant log output

$ bundle exec ruby -roctokit -e 'p Octokit::VERSION'
To use multipart middleware with Faraday v2.0+, install `faraday-multipart` gem; note: this is used by the ManageGHES client for uploading licenses
"9.1.0"

Code of Conduct

• I agree to follow this project's Code of Conduct

[github-actions]

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