chore(*): remove unused code (#6781)

The code removed in the PR was flagged as unused by the JetBrains
inspector.

I did a QA on the dev environment but other checks are highly
recommended.

There is one commit by scope to make the review easier.

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/engine/api/graphql/graphql-config/graphql-config.service.ts

@@ -75,9 +75,6 @@ export class GraphQLConfigService
 
           const data = await this.tokenService.validateToken(context.req);
 
-          user = data.user;
-          workspace = data.workspace;
-
           return await this.createSchema(context, data);
         } catch (error) {
           if (error instanceof UnauthorizedException) {