chore: remove unused import. GNP-5433.

frontend/src/app/site-card/site-card.component.ts

 import { Component, OnInit } from '@angular/core';
 import { BrapiService } from '../brapi.service';
 import { ActivatedRoute } from '@angular/router';
-import { SiteModel, SiteResultModel } from '../model/site.model';
+import { SiteModel } from '../model/site.model';
 
 @Component({
     selector: 'gpds-site-card',