Potential fix for code scanning alert no. 8: Unused global variable

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: rerpha

src/saluki/main.py

@@ -10,7 +10,6 @@
 logging.basicConfig(level=logging.INFO)
 
 _LISTEN = "listen"
-_PRODUCE = "produce"
 _CONSUME = "consume"