Readme: remove "downloads", "python versions" link

The download stats seems to be inflated, but I don't know why.

README.md

@@ -1,8 +1,7 @@
 # Kaitai Struct: runtime library for Python
 
 [![PyPI](https://img.shields.io/pypi/v/kaitaistruct)](https://pypi.org/project/kaitaistruct/)
-<a>![PyPI - Python Version](https://img.shields.io/pypi/pyversions/kaitaistruct)</a>
-[![PyPI - Downloads](https://img.shields.io/pypi/dd/kaitaistruct)](https://pypistats.org/packages/kaitaistruct)
+[![PyPI - Python Version](https://img.shields.io/pypi/pyversions/kaitaistruct)](https://pypi.org/project/kaitaistruct/#:~:text=Programming%20Language)
 
 This library implements Kaitai Struct API for Python.