Remove infinite empty loop

[Lagovas]

Here removed extra statement with default that avoid expected blocking execution and work as infinite loop.
There is no tests because I don't know how to test removing this statement without overengineering like add more logs, subscribe in tests with new handler and check that logs weren't generated. But this log entry we don't need even with debug level and will produce redundant messages...
So imho, we can just remove this statement and believe that it works better. But maybe someone can suggest some way to test it, I will add it.

Checklist

• [-] Change is covered by automated tests
• The coding guidelines are followed
• Public API has proper documentation in the Acra documentation site or has PR on documentation repository
  with new changes
• CHANGELOG.md is updated (in case of notable or breaking changes)
• CHANGELOG_DEV.md is updated
• Benchmark results are attached (if applicable)
• Example projects and code samples are up-to-date (in case of API changes)