[sigh][manage] print warning when no profiles for cleanup found

[kambala-decapitator]

Checklist

• I've run bundle exec rspec from the root directory to see all new and existing tests pass
• I've followed the fastlane code style and run bundle exec rubocop -a to ensure the code style is valid
• I see several green ci/circleci builds in the "All checks have passed" section of my PR (connect CircleCI to GitHub if not)
• I've read the Contribution Guidelines
• I've updated the documentation if necessary.
• I've added or updated relevant unit tests.

Motivation and Context

It makes no sense to ask for confirmation to delete 0 profiles

Description

Warning for 0 profiles + early return

Testing Steps

bundle exec fastlane sigh manage -e -p random_rubbish