Drop a role.
Syntax
      DROP ROLE role
Key
   role     The role to drop. 
Roles that have members and fixed database roles cannot be dropped from the database.
Example
DROP REMOTE SERVICE BINDING MyBinding ;
"I don't know if I believe in role models. We're all so different; we're all individuals. In the long run, that's what matters" ~ Wilson Cruz
Related commands:
  CREATE ROUTE
  ALTER ROUTE
  sys.database_role_members  
Equivalent Oracle command:  DROP ROLE