[IMP] hr_payroll: remove broken field total_wage

This field is broken since 230e12b in 2011 (return value to inexistant 'basic'
key). As it was never used and not working, remove it.

Closes #8781
Closes #8785

addons/hr_payroll/hr_payroll.py

@@ -924,24 +924,6 @@ class hr_employee(osv.osv):
     _inherit = 'hr.employee'
     _description = 'Employee'
 
-    def _calculate_total_wage(self, cr, uid, ids, name, args, context):
-        if not ids: return {}
-        res = {}
-        current_date = datetime.now().strftime('%Y-%m-%d')
-        for employee in self.browse(cr, uid, ids, context=context):
-            if not employee.contract_ids:
-                res[employee.id] = {'basic': 0.0}
-                continue
-            cr.execute( 'SELECT SUM(wage) '\
-                        'FROM hr_contract '\
-                        'WHERE employee_id = %s '\
-                        'AND date_start <= %s '\
-                        'AND (date_end > %s OR date_end is NULL)',
-                         (employee.id, current_date, current_date))
-            result = dict(cr.dictfetchone())
-            res[employee.id] = {'basic': result['sum']}
-        return res
-
     def _payslip_count(self, cr, uid, ids, field_name, arg, context=None):
         Payslip = self.pool['hr.payslip']
         return {
@@ -951,6 +933,5 @@ class hr_employee(osv.osv):
 
     _columns = {
         'slip_ids':fields.one2many('hr.payslip', 'employee_id', 'Payslips', required=False, readonly=True),
-        'total_wage': fields.function(_calculate_total_wage, method=True, type='float', string='Total Basic Salary', digits_compute=dp.get_precision('Payroll'), help="Sum of all current contract's wage of employee."),
         'payslip_count': fields.function(_payslip_count, type='integer', string='Payslips', groups="base.group_hr_user"),
     }