fix(machine-learning) Remove unsused database config (#745)

machine-learning/src/app.module.ts

@@ -1,15 +1,9 @@
 import { Module } from '@nestjs/common';
 import { ImageClassifierModule } from './image-classifier/image-classifier.module';
-import { databaseConfig } from './config/database.config';
-import { TypeOrmModule } from '@nestjs/typeorm';
 import { ObjectDetectionModule } from './object-detection/object-detection.module';
 
 @Module({
-  imports: [
-    TypeOrmModule.forRoot(databaseConfig),
-    ImageClassifierModule,
-    ObjectDetectionModule,
-  ],
+  imports: [ImageClassifierModule, ObjectDetectionModule],
   controllers: [],
   providers: [],
 })