cleaning imports

api/src/engine/connectors/exareme/tests/e2e/id3.e2e-spec.ts

 import { Test, TestingModule } from '@nestjs/testing';
-import { GroupsResult } from 'src/engine/models/result/groups-result.model';
 import { RawResult } from 'src/engine/models/result/raw-result.model';
-import { TableResult } from 'src/engine/models/result/table-result.model';
 import { AppModule } from '../../../../../main/app.module';
 import { ENGINE_SERVICE } from '../../../../engine.constants';
 import { IEngineService } from '../../../../engine.interfaces';

api/src/engine/connectors/exareme/tests/e2e/kaplan-meier.e2e-spec.ts

 import { Test, TestingModule } from '@nestjs/testing';
-import { ParamType } from 'src/engine/models/experiment/input/algorithm-parameter.input';
-import { RawResult } from 'src/engine/models/result/raw-result.model';
 import { AppModule } from '../../../../../main/app.module';
 import { ENGINE_SERVICE } from '../../../../engine.constants';
 import { IEngineService } from '../../../../engine.interfaces';

api/src/engine/connectors/exareme/tests/e2e/multiple-histograms.e2e-spec.ts

 import { Test, TestingModule } from '@nestjs/testing';
-import { RawResult } from 'src/engine/models/result/raw-result.model';
 import { AppModule } from '../../../../../main/app.module';
 import { ENGINE_SERVICE } from '../../../../engine.constants';
 import { IEngineService } from '../../../../engine.interfaces';