remove thread pool wrapper

[pgrayy]

Description

Remove ThreadPoolWrapper as it is not offering any additional functionality on top of concurrent.futures.ThreadPoolExecutor.

Documentation PR

strands-agents/docs#117

Type of Change

• Bug fix
• New feature
• Breaking change: Unlikely but possible. For more details, see comments in diff.
• Documentation update
• Other (please describe):

Testing

How have you tested the change? Verify that the changes do not break functionality or introduce warnings in consuming repositories: agents-docs, agents-tools, agents-cli

• I ran hatch run prepare

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

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