don't set base_amount in test_createEditablePaySheetLine, it's not required.

also explain why we need cell in the model line for editable model line to work


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@21264 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/tests/testPayroll.py

@@ -1159,10 +1159,10 @@ class TestPayroll(TestPayrollMixin):
           portal_type='Pay Sheet Model Line',
           resource_value=self.labour,
           variation_category_list=['tax_category/employee_share'],
-          base_amount_list=['base_salary'],
           editable=1)
-    # Note that for now it is required that the editable line contains at least
-    # one cell
+    # Note that it is required that the editable line contains at least one
+    # cell, to know which tax_category is used (employee share or employer
+    # share).
     line.updateCellRange(base_id='movement')
     cell = line.newCell('tax_category/employee_share',
                         portal_type='Pay Sheet Cell',