Delete tier1_network_info RPC endpoint (#9403)

This endpoint was added mistakenly (by me) in #8181.

It returns a response completely identical to the one given by the `network_info` endpoint and adds no functionality.

Also, @telezhnaya pulled numbers from the last 6 months and `tier1_network_info` was used 0 times.

chain/jsonrpc/src/lib.rs

@@ -297,9 +297,6 @@ impl JsonRpcHandler {
                 process_method_call(request, |params| self.next_light_client_block(params)).await
             }
             "network_info" => process_method_call(request, |_params: ()| self.network_info()).await,
-            "tier1_network_info" => {
-                process_method_call(request, |_params: ()| self.tier1_network_info()).await
-            }
             "query" => {
                 let params = RpcRequest::parse(request.params)?;
                 let query_response = self.query(params).await;
@@ -1024,16 +1021,6 @@ impl JsonRpcHandler {
         Ok(network_info.rpc_into())
     }
 
-    async fn tier1_network_info(
-        &self,
-    ) -> Result<
-        near_jsonrpc_primitives::types::network_info::RpcNetworkInfoResponse,
-        near_jsonrpc_primitives::types::network_info::RpcNetworkInfoError,
-    > {
-        let network_info = self.client_send(GetNetworkInfo {}).await?;
-        Ok(network_info.rpc_into())
-    }
-
     async fn gas_price(
         &self,
         request_data: near_jsonrpc_primitives::types::gas_price::RpcGasPriceRequest,
@@ -1423,18 +1410,6 @@ fn network_info_handler(
     response.boxed()
 }
 
-fn tier1_network_info_handler(
-    handler: web::Data<JsonRpcHandler>,
-) -> impl Future<Output = Result<HttpResponse, HttpError>> {
-    let response = async move {
-        match handler.tier1_network_info().await {
-            Ok(value) => Ok(HttpResponse::Ok().json(&value)),
-            Err(_) => Ok(HttpResponse::ServiceUnavailable().finish()),
-        }
-    };
-    response.boxed()
-}
-
 pub async fn prometheus_handler() -> Result<HttpResponse, HttpError> {
     metrics::PROMETHEUS_REQUEST_COUNT.inc();
 
@@ -1576,10 +1551,6 @@ pub fn start_http(
                     .route(web::head().to(health_handler)),
             )
             .service(web::resource("/network_info").route(web::get().to(network_info_handler)))
-            .service(
-                web::resource("/tier1_network_info")
-                    .route(web::get().to(tier1_network_info_handler)),
-            )
             .service(web::resource("/metrics").route(web::get().to(prometheus_handler)))
             .service(web::resource("/debug/api/entity").route(web::post().to(handle_entity_debug)))
             .service(web::resource("/debug/api/{api}").route(web::get().to(debug_handler)))