remove deprecated meta tags for old Windows Mobile and BlackBerry (#191)

layouts/_default/baseof.html

@@ -5,9 +5,6 @@
     <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
     {{/* NOTE: the Site's title, and if there is a page title, that is set too */}}
     <title>{{ block "title" . }}{{ .Site.Title }} {{ with .Params.Title }} | {{ . }}{{ end }}{{ end }}</title>
-    <meta name="HandheldFriendly" content="True">
-    <meta name="MobileOptimized" content="320">
-
     <meta name="viewport" content="width=device-width,minimum-scale=1">
     {{ .Hugo.Generator }}
     {{/* NOTE: For Production make sure you add `HUGO_ENV="production"` before your build command */}}