deliverers module is deprecated and removed gracefully from the system

[Advaitgaur004]

What is the purpose of the change

1. Removes redundant status check in SingleMessageDeliverer.get_nowait()
2. Corrects dictionary key checking in cluster directories

Brief changelog

• src/dubbo/deliverers.py:

  • Removed redundant status check in get_nowait() method
  • Improved state transition logic

• src/dubbo/cluster/directories.py:

  • Fixed incorrect dictionary key checking from .items() to direct key lookup

Verifying this change

1. Manual Testing

• Tested message delivery with various status combinations
• Verified directory updates with multiple URLs

Checklist

• Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• GitHub Actions also works fine on my and this branch.

[Advaitgaur004]

Incorrect as items() return a list of tuples.

[Advaitgaur004]

Redundant, as it never entered this block if the previous condition is true; therefore, this block statement is impossible.

[cnzakii]

You're right, but the entire delivers module has been deprecated and is no longer referenced by any other module. Could you please remove the entire module?

[Advaitgaur004]

okay i'll do that

[Advaitgaur004]

@AlbumenJ @cnzakii Have a look.

[cnzakii]

LGTM

[Advaitgaur004]

find . -type f -name "test_*.py" -exec grep -l "deliverers" {} \; gives nothing as not test refer this module.

• No other module imports or uses it
• Its functionality (message delivery) is handled by other mechanisms
• No tests reference it
• No configuration uses it
• Not mentioned in examples or documentation

#42 Updated

Safely Removed deliverers module