Guard against 0 New Jersey WorkForce rate. Remove broken New York test.

l10n_us_nj_hr_payroll/data/rules_2018.xml

@@ -201,6 +201,9 @@ else:
         <field name="amount_python_compute">
 result_rate = -contract.nj_wf_rate(2018)
 result = categories.NJ_WF_WAGES
+
+if result_rate == 0.0:
+  result = 0.0
         </field>
         <field name="register_id" ref="contrib_register_njdor_wf"/>
         <field name="appears_on_payslip" eval="False"/>

l10n_us_ny_hr_payroll/tests/test_us_ny_payslip_2018.py

@@ -150,18 +150,3 @@ class TestUsNYPayslip(TestUsPayslip):
 
         self.assertPayrollEqual(cats['NY_WITHHOLD'], wh)
 
-    def test_tax_exempt(self):
-        schedule_pay = 'monthly'
-
-        wh = 0.0
-
-        employee = self._createEmployee()
-
-        contract = self._createContract(employee,
-                                        salary,
-                                        struct_id=self.ref(
-                                            'l10n_us_ny_hr_payroll.hr_payroll_salary_structure_us_ny_employee'),
-                                        schedule_pay=schedule_pay)
-        contract.ny_it2104_filing_status = 'exempt'
-
-        self.assertPayrollEqual(cats['NY_WITHHOLD'], wh)