update readme

README.rst

@@ -1,7 +1,7 @@
 nanite
 ======
 
-|PyPI Version| |Build Status Unix| |Build Status Win| |Coverage Status| |Docs Status|
+|PyPI Version| |Build Status| |Coverage Status| |Docs Status|
 
 Loading, fitting, and rating AFM force-distance data.
 
@@ -23,10 +23,8 @@ To install the latest release, simply run:
 
 .. |PyPI Version| image:: https://img.shields.io/pypi/v/nanite.svg
    :target: https://pypi.python.org/pypi/nanite
-.. |Build Status Unix| image:: https://img.shields.io/github/workflow/status/AFM-analysis/nanite/Checks
+.. |Build Status| image:: https://img.shields.io/github/workflow/status/AFM-analysis/nanite/Checks
    :target: https://github.com/AFM-analysis/nanite/actions?query=workflow%3AChecks
-.. |Build Status Win| image:: https://img.shields.io/appveyor/ci/paulmueller/nanite/master.svg?label=build_win
-   :target: https://ci.appveyor.com/project/paulmueller/nanite
 .. |Coverage Status| image:: https://img.shields.io/codecov/c/github/AFM-analysis/nanite/master.svg
    :target: https://codecov.io/gh/AFM-analysis/nanite
 .. |Docs Status| image:: https://readthedocs.org/projects/nanite/badge/?version=latest