Remove defunct list of Windows installers. (#1192)

Listed as "Archived" at https://www.cgohlke.com/.

Author: bhrutledge

source/guides/installing-scientific-packages.rst

@@ -64,12 +64,6 @@ up a suitable environment to build extensions locally.
 The extensions provided in these installers are typically compatible with
 the CPython Windows installers published on python.org.
 
-For projects which don't provide their own Windows installers (and even
-some which do), Christoph Gohlke at the University of California provides
-a `collection of Windows installers
-<https://www.lfd.uci.edu/~gohlke/pythonlibs/>`__. Many Python users on
-Windows have reported a positive experience with these prebuilt versions.
-
 As with Linux system packages, the Windows installers will only install into a
 system Python installation - they do not support installation in virtual
 environments. Allowing access to distributions installed into the system Python