Readme updated with default baudrate

Author: deepikabhavnani

README.md

@@ -110,9 +110,7 @@ You can view individual examples and additional API information of the statistic
 
 ### Output
 
-To view the serial output you can use any terminal client of your choosing such as [PuTTY](http://www.putty.org/) or [CoolTerm](http://freeware.the-meiers.org/).
-
-The default baud rate for this application is set to `115200` and may be modified in the `mbed_app.json` file.
+To view the serial output you can use any terminal client of your choosing such as [PuTTY](http://www.putty.org/) or [CoolTerm](http://freeware.the-meiers.org/). Unless otherwise specified, printf defaults to a baud rate of 9600 on Mbed OS.
 
 You can find more information on the Mbed OS configuration tools and serial communication in Mbed OS in the related [related links section](#related-links).