Clean code

client/src/app/instance/instance.component.spec.ts

+import { Component, Input } from '@angular/core';
 import { TestBed, waitForAsync, ComponentFixture  } from '@angular/core/testing';
 import { RouterTestingModule } from '@angular/router/testing';
 
-import { of } from 'rxjs';
 import { provideMockStore, MockStore } from '@ngrx/store/testing';
+import { of } from 'rxjs';
 
 import { InstanceComponent } from './instance.component';
 import { AppConfigService } from 'src/app/app-config.service';
 import * as authActions from 'src/app/auth/auth.actions';
-import { Component, EventEmitter, Input, Output } from '@angular/core';
-import { Attribute, Instance } from '../metamodel/models';
+import { Instance } from '../metamodel/models';
 import { UserProfile } from '../auth/user-profile.model';
 import * as datasetFamilyActions from '../metamodel/actions/dataset-family.actions';
 import * as datasetActions from '../metamodel/actions/dataset.actions';