[GraphQL] Remove version related routes (#19410)

## Description 

Removes the version related routes.

## Test plan 

Existing tests

---

## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [x] GraphQL: GraphQL only supports one version instead of `beta,
stable, legacy`. This change removes the previous routes and only allows
for `/` and `/graphql`, which will always point to the latest version.
- [ ] CLI: 
- [ ] Rust SDK:
- [ ] REST API:

crates/sui-graphql-rpc/src/server/builder.rs

@@ -265,12 +265,9 @@ impl ServerBuilder {
         if self.router.is_none() {
             let router: Router = Router::new()
                 .route("/", post(graphql_handler))
-                .route("/:version", post(graphql_handler))
                 .route("/graphql", post(graphql_handler))
-                .route("/graphql/:version", post(graphql_handler))
                 .route("/health", get(health_check))
                 .route("/graphql/health", get(health_check))
-                .route("/graphql/:version/health", get(health_check))
                 .with_state(self.state.clone())
                 .route_layer(CallbackLayer::new(MetricsMakeCallbackHandler {
                     metrics: self.state.metrics.clone(),