chore: remove redundant create role mutation

packages/backend/src/graphql/mutations/create-role.ee.js

@@ -1,29 +0,0 @@
-import kebabCase from 'lodash/kebabCase.js';
-import Role from '../../models/role.js';
-
-const createRole = async (_parent, params, context) => {
-  context.currentUser.can('create', 'Role');
-
-  const { name, description, permissions } = params.input;
-  const key = kebabCase(name);
-
-  const existingRole = await Role.query().findOne({ key });
-
-  if (existingRole) {
-    throw new Error('Role already exists!');
-  }
-
-  return await Role.query()
-    .insertGraph(
-      {
-        key,
-        name,
-        description,
-        permissions,
-      },
-      { relate: ['permissions'] }
-    )
-    .returning('*');
-};
-
-export default createRole;