[BOARDS] Remove Arduino boards (#1929)

docs/use/gateway.md

@@ -77,10 +77,6 @@ By default this function is not available on the pre built binary of RFBridge, i
 ```
 build_flags = '-UMQTTsetMQTT'
 ``` 
-Arduino boards does not have this function per default also, to add it:
-```
-build_flags = '-DMQTTsetMQTT'
-``` 
 :::
 
 ::: tip

docs/use/ir.md

@@ -97,11 +97,7 @@ mosquitto_pub -t home/OpenMQTTGateway/commands/MQTTtoIR -m '{"value":551489775,"
 
 ## Send raw IR data by MQTT
 
-2) If you use an Arduino UNO enable `IR_Raw` by uncommenting the line 129 in User_config.h
-`#define IR_Raw`
-If you are using the uno you will have to comment other gateway like ZgatewayRF, ZgatewayBT and ZgatewayIR to keep enough memory
-
-3) publish your code like below
+Publish your code like below
 ```
 mosquitto_pub -t home/OpenMQTTGateway/commands/MQTTtoIR -m '{"raw":"8850,4450,600,550,550,550,600,1600,600,550,600,500,600,500,600,550,600,500,600,1650,600,1600,600,550,600,1600,600,1650,600,1600,600,1650,600,1600,600,550,600,500,600,550,550,1650,600,500,600,550,600,500,600,550,550,1650,600,1650,550,1650,600,550,550,1650,600,1650,550,1650,600,1650,600","protocol_name":"Raw"}'
 ```