remove unused code

src/utils/pipes/rpc.validation-pipe.ts

@@ -1,14 +0,0 @@
-import { Injectable, ValidationPipe } from '@nestjs/common';
-import { RpcException } from '@nestjs/microservices';
-
-@Injectable()
-export class RpcValidationPipe extends ValidationPipe {
-  createExceptionFactory() {
-    return (validationErrors = []) => {
-      return new RpcException({
-        code: 3,
-        message: this.flattenValidationErrors(validationErrors),
-      });
-    };
-  }
-}

src/utils/tests/unit/rpc-validation-pipe.usecase.spec.ts

@@ -1,22 +0,0 @@
-import { ArgumentMetadata } from '@nestjs/common';
-import { RpcValidationPipe } from '../../pipes/rpc.validation-pipe';
-import { ValidateAuthenticationRequestDto } from '@modules/authentication/interface/grpc-controllers/dtos/validate-authentication.request.dto';
-
-describe('RpcValidationPipe', () => {
-  it('should not validate request', async () => {
-    const target: RpcValidationPipe = new RpcValidationPipe({
-      whitelist: true,
-      forbidUnknownValues: false,
-    });
-    const metadata: ArgumentMetadata = {
-      type: 'body',
-      metatype: ValidateAuthenticationRequestDto,
-      data: '',
-    };
-    await target
-      .transform(<ValidateAuthenticationRequestDto>{}, metadata)
-      .catch((err) => {
-        expect(err.message).toEqual('Rpc Exception');
-      });
-  });
-});