Remove deprecated transaction count

apps/api/src/app/admin/admin.service.ts

@@ -186,7 +186,6 @@ export class AdminService {
       dataProviders,
       settings,
       userCount,
-      transactionCount: activitiesCount,
       version: environment.version
     };
   }

libs/common/src/lib/interfaces/admin-data.interface.ts

@@ -7,10 +7,6 @@ export interface AdminData {
     useForExchangeRates: boolean;
   })[];
   settings: { [key: string]: boolean | object | string | string[] };
-
-  /** @deprecated use activitiesCount instead */
-  transactionCount: number;
-
   userCount: number;
   version: string;
 }