Revert "feat: implement IndexerService for InvoiceMinted events"

.env.example

@@ -1,10 +0,0 @@
-# Stellar Configuration
-STELLAR_HORIZON_URL=https://horizon-testnet.stellar.org
-CONTRACT_ID=CCYU3LOQI34VHVN3ZOSEBHHKL4YK36FMTOEGLRYDUDRGS7JOLLRKCEQM
-
-# Database Configuration (existing)
-DB_HOST=localhost
-DB_PORT=5432
-DB_USERNAME=postgres
-DB_PASSWORD=password
-DB_DATABASE=tradeflow

src/app.module.ts

@@ -2,11 +2,10 @@ import { Module } from '@nestjs/common';
 import { AppController } from './app.controller';
 import { AppService } from './app.service';
 import { HealthModule } from './health/health.module';
-import { IndexerService } from './indexer.service';
 
 @Module({
   imports: [HealthModule],
   controllers: [AppController],
-  providers: [AppService, IndexerService],
+  providers: [AppService],
 })
 export class AppModule {}