Merge pull request #26002 from nishanthdass:doc/missing-fields-python-tutorials

Remove empty Additional Resources and Exercises fields from tutorials #26002

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

This PR is in response to issue [26001](https://github.com/opencv/opencv/issues/26001)

This pull request addresses the issue of empty "Additional Resources" and "Exercises" fields in several OpenCV-Python tutorials. The empty sections have been removed to improve the clarity and consistency of the documentation.

doc/py_tutorials/py_setup/py_setup_in_fedora/py_setup_in_fedora.markdown

@@ -237,9 +237,6 @@ make doxygen
 @endcode
 Then open opencv/build/doc/doxygen/html/index.html and bookmark it in the browser.
 
-Additional Resources
---------------------
-
 Exercises
 ---------
 

doc/py_tutorials/py_setup/py_setup_in_windows/py_setup_in_windows.markdown

@@ -116,9 +116,6 @@ Building OpenCV from source
 @note We have installed with no other support like TBB, Eigen, Qt, Documentation etc. It would be
 difficult to explain it here. A more detailed video will be added soon or you can just hack around.
 
-Additional Resources
---------------------
-
 Exercises
 ---------