Remove IE-specific images/files.

site/layouts/partials/favicons.html

@@ -5,5 +5,4 @@
 <link rel="manifest" href="/docs/{{ .Site.Params.docs_version }}/assets/img/favicons/manifest.json">
 <link rel="mask-icon" href="/docs/{{ .Site.Params.docs_version }}/assets/img/favicons/safari-pinned-tab.svg" color="#7952b3">
 <link rel="icon" href="/docs/{{ .Site.Params.docs_version }}/assets/img/favicons/favicon.ico">
-<meta name="msapplication-config" content="/docs/{{ .Site.Params.docs_version }}/assets/img/favicons/browserconfig.xml">
 <meta name="theme-color" content="#7952b3">

site/static/docs/5.0/assets/img/favicons/browserconfig.xml

@@ -1,9 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<browserconfig>
-  <msapplication>
-    <tile>
-      <square150x150logo src="/docs/5.0/assets/img/favicons/mstile-150x150.png"/>
-      <TileColor>#7952b3</TileColor>
-    </tile>
-  </msapplication>
-</browserconfig>