Revert "Add serial sensor docs"

This reverts commit 9a1e3d1658c9c00e90fc157f3d15fe9a407c2bce.

source/_components/sensor.serial.markdown

@@ -1,55 +0,0 @@
----
-layout: page
-title: "Serial Sensor"
-description: "Instructions how to integrate data from serial connected sensors into Home Assistant."
-date: 2017-10-13 07:00
-sidebar: true
-comments: false
-sharing: true
-footer: true
-logo: home-assistant.png
-ha_category: Sensor
-ha_release: 0.56
-ha_iot_class: "Local Polling"
----
-
-The `serial` sensor platform is using the data provided by a device connected to the serial port of the system where Home Assistant is running. With [`ser2net`](http://ser2net.sourceforge.net/) and [`socat`](http://www.dest-unreach.org/socat/) would it also work for sensors connected to a remote system.
-
-To check what kind of data is arriving at your serial port, use a command-line tool like `minicom` or `picocom` on Linux, on a macOS you can use `screen` or on Windows `putty`. 
-
-```bash
-$ sudo minicom -D /dev/ttyACM0
-```
-
-To setup a serial sensor to your installation, add the following to your `configuration.yaml` file:
-
-```yaml
-# Example configuration.yaml entry
-sensor:
-  - platform: serial
-    port: /dev/ttyACM0
-```
-
-{% configuration %}
-  port:
-    description: Local serial port where the sensor is connected and access is granted.
-    required: true
-    type: string
-  name:
-    description: Friendly name to use for the frontend. Default to "Serial sensor".
-    required: false
-    type: string
-{% endconfiguration %}
-
-
-## {% linkable_title `value_template` for Template sensor %}
-
-### {% linkable_title TMP36 %}
-
-{% raw %}
-```yaml
-"{{ (((states('sensor.serial_sensor') | float * 5 / 1024 ) - 0.5) * 100) | round(1) }}"
-```
-{% endraw %}
-
-