doc: strip component; instead use repo to document alone

README.md

@@ -1,3 +1,6 @@
 # [WIP] ESPHome component for the KP18{2,4} series of programmable loads
 
 Designed to expose attributes of these programmable loads to ESPHome.
+
+## [WIP] Using the `modbus_controller` component
+https://esphome.io/components/modbus_controller.html#example-client

esphome/components/kp182/kp18x.cpp

@@ -1,18 +0,0 @@
-
-namespace esphome {
-  namespace kp18x {
-
-    class kp18x: public serial_port
-
-         public void write_register(register register, uint value)
-        {
-            byte[] message = new byte[11 + 2];
-            message[6] = sizeof(uint); //4
-            message[7] = (byte)(value >> 24);
-            message[8] = (byte)(value >> 16);
-            message[9] = (byte)(value >> 8);
-            message[10] = (byte)(value >> 0);
-            send_message(command.write_single, (ushort)register, 1, ref message);
-            delay();
-            get_response(9);
-        }