[I] Remove the empty double_blocking_queue module from pyamber [texera]

["aglinxinyuan (via GitHub)" <gi...@apache.org>]

aglinxinyuan opened a new issue, #7033:
URL: https://github.com/apache/texera/issues/7033

   ### Task Summary
   
   `amber/src/main/python/core/util/customized_queue/double_blocking_queue.py` has contained no code since 2022. All 16 remaining lines are the ASF license header.
   
   How it got here:
   
   | When | What |
   | --- | --- |
   | 2021-07-23 | `DoubleBlockingQueue` added by #1262 |
   | 2022-11-29 | #1725 replaced `InternalQueue`'s backing store with `LinkedBlockingMultiQueue` and emptied the class — but left the file |
   | 2025-05-03 | #3415 stamped an ASF license header onto the now-empty file |
   
   Nothing imports it. The package barrel `customized_queue/__init__.py` exports only `LinkedBlockingMultiQueue` and `IQueue`, and there is no reference to the module in any source file, test, config or doc.
   
   Deleting it is a one-file removal with no behaviour change: −16 lines.
   
   ### Task Type
   
   - [x] Refactor / Cleanup
   


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Re: [I] Remove the empty double_blocking_queue module from pyamber [texera]

["aglinxinyuan (via GitHub)" <gi...@apache.org>]

aglinxinyuan closed issue #7033: Remove the empty double_blocking_queue module from pyamber
URL: https://github.com/apache/texera/issues/7033


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