Update README to remove init-default-roles command

Removed initialization of default roles from README.

Author: ComputerEndProgram

README.md

@@ -71,9 +71,6 @@ Required fields:
 # Build the project
 npm run build
 
-# Initialize default roles (admin and moderator)
-node ./build/src/tools/init-default-roles.js
-
 # Start the server
 npm start
 ```