Revert "Add Windows to trusty_note (travis-ci#2164)"

This reverts commit 943a41d.

Author: plaindocs

_data/snippets.yml

@@ -30,7 +30,6 @@ trusty_note: |
   >  * [Trusty](/user/reference/trusty/)
   >  * [Xenial](/user/reference/xenial/)
   >  * [OS X](/user/reference/osx/)
-  >  * [Windows](/user/reference/windows/)
 trusty_note_no_osx: |
   > Language versions and other build-environment specific
   > information are in our reference pages: