Remove AppVeyor skip commits setting

.appveyor.yml

@@ -7,11 +7,6 @@ branches:
         - master
         - 3.3-stable
 skip_tags: true
-skip_commits:
-    files:
-        - README.md
-        - LICENSE.md
-        - docs/*
 environment:
     matrix:
         - GENERATOR: MinGW Makefiles