Remove obsolete mobile page (#12257)

* Remove obsolete mobile page

* Cleanup asset

source/_docs/ecosystem/certificates/lets_encrypt.markdown

@@ -362,7 +362,7 @@ https://YOUR-HA-IP:8123
 
 Some cases such as this are where your router does not allow 'loopback' or where there is a problem with incoming connections due to technical failure. In these cases you can still use your internal connection and safely ignore the warnings.
 
-If you were previously using a webapp on your phone/tablet to access your Home Assistant you should delete the old one and create a new one with the new address. The old one will no longer work as it is not keyed to your new, secure URL.  Instructions for creating your new webapp can be found [here](/docs/frontend/mobile/).
+If you were previously using a webapp on your phone/tablet to access your Home Assistant you should delete the old one and create a new one with the new address. The old one will no longer work as it is not keyed to your new, secure URL.
 
 All done? Accessing your Home Assistant from across the world with your DuckDNS URL and a lovely secure logo on your browser? Ace! Now let's clean up our port forwards so that we are only exposing the parts of our network that are absolutely necessary to the outside world.
 

source/_docs/frontend/mobile.markdown

@@ -1,29 +0,0 @@
----
-title: "Getting started on Mobile"
-description: "Android/iOS instructions to add Home Assistant to your homescreen."
-redirect_from: /getting-started/mobile/
----
-
-Home Assistant has [a companion app for both Android and iOS](/docs/ecosystem/ios/).
-
-As an alternative to the iOS and Android companion apps, you can add the Home Assistant "web app" to your homescreen as if it was native (Home Assistant leverages the W3C [`manifest.json`](https://w3c.github.io/manifest/) support).
-
-## Android
-
-  1. Open Chrome
-  2. Navigate to your Home Assistant instance
-  3. Tap on the Menu icon (three vertical bars)
-  4. Tap on Add to Homescreen
-  5. A dialog will popup; tap on Add
-
-<p class='img' style='max-width:500px; margin-left: auto; margin-right: auto;'>
-  <img src='/images/screenshots/android-homescreen-guide.gif' />
-</p>
-
-## iOS
-
-  1. Open Safari
-  2. Navigate to your Home Assistant instance
-  3. Tap on the Share icon in the middle of the bottom toolbar
-  4. Tap on "Add to Home Screen"
-  5. A dialog will popup; tap on Add

source/_includes/asides/docs_navigation.html

@@ -98,9 +98,6 @@
       <li>
         <b>{% active_link /docs/frontend/ Frontend %}</b>
         <ul>
-          <li>
-            {% active_link /docs/frontend/mobile/ Android/iOS Homescreen %}
-          </li>
           <li>
             {% active_link /docs/frontend/browsers/ Browser Compatibility List
             %}

source/_redirects

@@ -2062,6 +2062,7 @@
 /docs/ecosystem/notebooks/graph https://data.home-assistant.io
 /docs/ecosystem/notebooks/installation https://data.home-assistant.io
 /docs/ecosystem/notebooks/stats https://data.home-assistant.io
+/docs/frontend/mobile https://companion.home-assistant.io
 /ecosystem/ios/notifications https://companion.home-assistant.io/docs/notifications/notifications-basic
 /ecosystem/notebooks https://data.home-assistant.io
 /ecosystem/notebooks/api https://data.home-assistant.io