Remove custom_updater instructions

custom_updater is broken and becoming deprecated

README.md

@@ -11,8 +11,6 @@ Home Assistant 0.84 or higher
 
 ## Installation
 
-### Installation _(Manual)_
-
 1. Download the `simple-thermostat.js` from the [latest release](https://github.com/nervetattoo/simple-thermostat/releases/latest) and store it in your `configuration/www` folder.
    _Previously you could download the source file from Github but starting from the 0.14 release that is no longer possible. If you try to do so it will crash_
 2. Configure Lovelace to load the card:
@@ -23,20 +21,6 @@ resources:
     type: module
 ```
 
-### Installation and tracking with `custom updater` _(Recommended)_
-
-1. Make sure you've the [custom_updater](https://github.com/custom-components/custom_updater) component installed and working.
-2. Configure Lovelace to load the card:.
-
-```yaml
-resources:
-  - url: /customcards/github/nervetattoo/simple-thermostat.js?track=true
-    type: module
-```
-
-3. Run the service `custom_updater.check_all` or click the "CHECK" button if you use the tracker-card.
-4. Refresh the website.
-
 ## Available configuration options:
 
 - `entity` _string_: The thermostat entity id **required**