Update esp8266 example doc

README.md

@@ -68,13 +68,11 @@ You should have the following ready before beginning with any board:
 
 - Locate the board's `Arduino.h` (`hardware/esp8266/<board package version>/cores/esp8266/` and comment out the line containing `#define round(x)`, around line 137.
 
-- Two folders up from the `Arduino.h` step above, in the same folder as the board's `platform.txt`, paste the [`platform.local.txt`](https://github.com/Azure/azure-iot-arduino/blob/master/examples/iothub_ll_telemetry_sample/esp8266/platform.local.txt) file from the `esp8266` folder in the sample into it.
+- Two folders up from the `Arduino.h` step above, in the same folder as the board's `platform.txt`, create file `platform.local.txt` containing a single line `build.extra_flags=-DESP8266 -DDONT_USE_UPLOADTOBLOB -DUSE_BALTIMORE_CERT`.
 
-	- Note1: It is necessary to add `-DDONT_USE_UPLOADTOBLOB` and `-DUSE_BALTIMORE_CERT` to `build.extra_flags=` in a `platform.txt` in order to run the sample, however, you can define them in your own `platform.txt` or a `platform.local.txt` of your own creation. 
+	- Note1: If your device is not intended to connect to the global portal.azure.com, please change the CERT define to the appropriate cert define as laid out in [`certs.c`](https://github.com/Azure/azure-iot-sdk-c/blob/master/certs/certs.c)
 
-	- Note2: If your device is not intended to connect to the global portal.azure.com, please change the CERT define to the appropriate cert define as laid out in [`certs.c`](https://github.com/Azure/azure-iot-sdk-c/blob/master/certs/certs.c)
-
-	- Note3: Due to RAM limits, you must select just one CERT define.
+	- Note2: Due to RAM limits, you must select just one CERT define.
 
 6. Run the sample.