Remove the task_timeout from the a2a sample config files

[AnuradhaKaruppiah]

The default a2a task timeout is 300s. The sample config was unnecessarily lowering it to 60s resulting in timeouts for slower agents.

Description

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Summary by CodeRabbit

• Chores
  • Simplified timeout configurations by removing explicit settings to rely on default system behavior across agent examples.

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[coderabbitai]

Walkthrough

Three A2A example configuration files have been modified to remove the explicit task_timeout: 60 setting from their respective a2a_client configurations, allowing the system to rely on default timeout behavior instead.

Changes

Cohort / File(s)	Summary
A2A Configuration Updates examples/A2A/currency_agent_a2a/configs/config.yml, examples/A2A/math_assistant_a2a/src/nat_math_assistant_a2a/configs/config.yml, examples/A2A/math_assistant_a2a_protected/configs/config-client.yml	Removed task_timeout: 60 setting from a2a_client configurations across three separate A2A examples. System will now use default timeout behavior.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: removing task_timeout settings from a2a sample configuration files across three files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[AnuradhaKaruppiah]

/merge