unpin freetype in windows ci conda yaml #595
Description
In #589 I pinned free_type<2.14 in ci/pyuvsim_tests_windows.yaml because version 2.14, which had just been released hours before on conda, was causing "access violation" errors on Windows tests. I found an old issue where that had been caused by freetype in the past (matplotlib/matplotlib#22006) and found that a new version had just been released, so I decided to try pinning it and that solved the problem. The error I was seeing was nearly identical to the error described in that old issue.
We should test unpinning freetype once a new version is out. To unpin, just remove the freetype item in the yaml, freetype is a dependency of matplotlib, so does not need to be specified in the yaml if there's no version requirement.