public struct stuff
{
    public int ID;
    public int quan;
}

prods.Remove(new stuff{ prodID = 1});

prods.Remove( prods.Single( s => s.ID == 1 ) );

var stuffToRemove = prods.SingleOrDefault( s => s.ID == 1 )
if( stuffToRemove.ID != 0 )
{
    prods.Remove( stuffToRemove );
}

prods.RemoveAll(s => s.ID == 1)

var itemtoremove = prods.Where(item => item.ID == 1).First();
prods.Remove(itemtoremove)

var prod = from p in prods
           where p.ID != 1
           select p;

stuff r;
foreach(stuff s in prods) {
  if(s.ID == 1) {
      r = s;
      break;
  }
}
prods.Remove(r);

for(int i = 0; i < prods.Length; i++) {
    if(prods[i].ID == 1) {
        prods.RemoveAt(i);
        break;
    }
}

prods.Remove(prods.Find(x => x.ID == 1));