Remove id, unconfirmed_transactions and tx_per_second from the statistics queries since we don't use them in the front end

frontend/src/app/interfaces/node-api.interface.ts

@@ -1,8 +1,5 @@
 export interface OptimizedMempoolStats {
-  id: number;
   added: number;
-  unconfirmed_transactions: number;
-  tx_per_second: number;
   vbytes_per_second: number;
   total_fee: number;
   mempool_byte_weight: number;