Here is the solution. But you need to run catia as admin. and change your xml file. which one you are using. i show it with ISO. if you need how to run catia as admin. check below.
Answered with a tutorial: https://grabcad.com/tutorials/how-to-remove-r-symbol-in-drafting-while-giving-dimension-to-fillets
use text with ladder
ı am actually more curious about why u need to delete R :)