Remove keyfeatures (#499)

Author: jarrodmillman

assets/theme-css/keyfeatures.css

@@ -17,10 +17,6 @@
     </section>
     {{ end }}
 
-    {{ if .Site.Params.keyfeatures }}
-    {{ partial "keyfeatures.html" . }}
-    {{ end }}
-
     {{ if .Site.Params.shell }}
     {{ partial "shell.html" . }}
     {{ end }}