Removing tool use from Use-Cases/agent_chat

[ekzhu]

Why are these changes needed?

Removing tool use section from Use-Cases/agent_chat as the content is covered in the tutorial chapter on tool use: https://microsoft.github.io/autogen/docs/tutorial/tool-use

Related issue number

#1597

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 ✅

Project coverage is 37.06%. Comparing base (a8abe59) to head (1c04eff).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2120   +/-   ##
=======================================
  Coverage   37.06%   37.06%           
=======================================
  Files          68       68           
  Lines        7069     7069           
  Branches     1543     1543           
=======================================
  Hits         2620     2620           
  Misses       4218     4218           
  Partials      231      231           

Flag	Coverage Δ
unittests	37.04% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[gagb]

Your edits look good. But I am not confident what role the Use Cases section is serving. The text in it is the seems like intro to autogen, which is already there in getting started?

[ekzhu]

Your edits look good. But I am not confident what role the Use Cases section is serving. The text in it is the seems like intro to autogen, which is already there in getting started?

Let's address this in the next PR. I think we will need @sonichi's input regarding moving the content of use-cases.