Mongo delete from array

mongo_delete

{
        "companyName": "LinkedIn",
        "managedBy": {
            "name": "Novicel agency",
            "email": "[email protected]",
            "umbracoMemberId": 1052,
            "umbracoMemberGuidId": "d5e2ec1b-44d8-4a71-806f-fc5a3f252e98",
            "agency": "Agency",
            "agencyId": 1051
        },
        "contractors": [
            "1494403d-e34b-4408-87e3-637d2b9be449",
            "27798ab9-68f3-4673-bc6e-21eaf1cea908",
            "0d260ee7-c5b7-4ae5-a081-18be1ebac75d"
        ],
        "id": "8064485a-8b23-4ff2-8b70-e29633a0a2c7",
        "updatedOn": "2020-03-13T11:47:54.36Z",
        "createdOn": "2020-03-10T10:24:01.292Z"
    }
    
        public void RemoveContractor(Guid contractorId)
        {
            FilterDefinition<Company> companiesAssignedToContractor = new ExpressionFilterDefinition<Company>(c=>c.Contractors.Contains(contractorId));
            
            var removeContractor = Builders<Company>.Update.PullFilter(f=>f.Contractors,p => p.Equals(contractorId)).Set(d=>d.UpdatedOn,DateTime.Now);

            _companyRepo.UpdateMany(companiesAssignedToContractor, removeContractor);
        }

Looks like you want a filter and update query like the following

        public void RemoveContractor(Guid contractorId)
        {
            var filter = Builders<Company>.Filter.AnyEq(c => c.Contractors, contractorId);

            var update = Builders<Company>.Update.Pull(x => x.Contractors, contractorId)
                .CurrentDate(x => x.UpdatedOn);
            
            _companyRepo.UpdateMany(filter, update);
        }