remove print config list

[sonichi]

Why are these changes needed?

remove print statement for config list in test.

Related issue number

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (899b250) 37.79% compared to head (86729fe) 49.63%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1637       +/-   ##
===========================================
+ Coverage   37.79%   49.63%   +11.83%     
===========================================
  Files          50       50               
  Lines        5704     5704               
  Branches     1295     1404      +109     
===========================================
+ Hits         2156     2831      +675     
+ Misses       3377     2645      -732     
- Partials      171      228       +57     

Flag	Coverage Δ
unittests	49.59% <100.00%> (+11.79%)	⬆️

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[ekzhu]

Good job removing this.

[ekzhu]

The test failure is likely due to GPT-3.5 (?)'s indeterministic response. Try re-running it again.