[FIX] payment, hr_timesheet_sheet: remove old onchanges in views

Those are already handled by new API onchange methods. They have
probably been forgotten when migrating the module to new API.

addons/hr_timesheet_sheet/views/hr_timesheet_sheet_views.xml

@@ -66,7 +66,7 @@
                 <sheet>
                     <div class="oe_title">
                         <label for="employee_id" class="oe_edit_only"/>
-                        <h1><field name="employee_id" on_change="onchange_employee_id(employee_id)" class="oe_inline" placeholder="Employee's Name"/></h1>
+                        <h1><field name="employee_id" class="oe_inline" placeholder="Employee's Name"/></h1>
                         <field name="user_id" invisible="1"/>
                     </div>
                     <group>

addons/payment/views/payment_views.xml

@@ -224,7 +224,7 @@
                                     <field name="currency_id" options="{'no_open': True, 'no_create': True}" class="oe_inline" />
                                 </div>
                                 <field name="fees"/>
-                                <field name="partner_id" on_change="on_change_partner_id(partner_id)"/>
+                                <field name="partner_id"/>
                                 <label for="partner_details" string="Customer Details"/>
                                 <div name="partner_details">
                                     <field name="partner_name" placeholder="Name" attrs="{'readonly': [('partner_id', '!=', False)]}"/>