Remove CMake from choco_packages.config

[lurch]

This will hopefully fix the Windows GitHub CI as https://github.com/actions/runner-images/blob/win22/20241113.3/images/windows/Windows2022-Readme.md#tools says that CMake is already installed by default.

GitHub CI for pico-sdk was failing on Windows with:

A newer version of cmake.install (v3.31.0) is already installed.
 Use --allow-downgrade or --force to attempt to install older versions.
Failed to install cmake because a previous dependency failed.

[lurch]

@liamfraser I guess #2075 means that this PR is redundant now?

[kilograham]

closed as obsolete per @liamfraser

[lurch]

This problem has popped up again in https://github.com/gneverov/pico-sdk/actions/runs/12738602275/job/35501170042 except now the error-message is:

Failures
 - cmake - Failed to install cmake because a previous dependency failed.
 - cmake.install - A newer version of cmake.install (v3.31.3) is already installed.
 Use --allow-downgrade or --force to attempt to install older versions.
Error: Process completed with exit code 1.

And https://github.com/actions/runner-images/blob/win22/20250105.1/images/windows/Windows2022-Readme.md#tools confirms that the 20250105.1.0 Windows GitHub runner image (which is the one that happened to be used by that CI run) now has CMake 3.31.3 pre-installed.