I want to remove a group from HR Settings section using my customized module.

Section to be removed in hr.view_employee_form has been added by hr_holidays_view.xml using inheritance

hr_view.xml(view_employee_form form)

<page string="HR Settings" groups="base.group_hr_user">
           <group>
                       <group string="Active" name="active_group">
                                <field name="active"/>
                         </group>
            </group>

 </page>

Code added by hr_holidays_view.xml

 <xpath expr="//group[@name='active_group']" position="before">
          <group string="Leaves">
                   <label for="remaining_leaves"/>
                        <div>
                            <field name="remaining_leaves" class="oe_inline"/> days
                        </div>
           </group>
  </xpath>

Code written by me to remove that Remaining Leaves block, in my customized module is :

<xpath expr="/form/sheet/notebook/page[@string='HR Settings']/group/group[@string='Leaves']" position="replace">

</xpath>

and I am getting following error:

AttributeError: View definition error for inherited view 'custom_emp.emp_code_view_form' on model 'hr.employee': Element '<xpath expr="/form/sheet/notebook/page[@string='HR Settings']/group/group[@string='Leaves']">' not found in parent view 'hr.view_employee_form'

Please help!

Updated Full Code :

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>

        <!--Employee form view -->
        <record id="emp_code_view_form" model="ir.ui.view">
            <field name="name">hr.employee.form.inherit</field>
            <field name="model">hr.employee</field>
            <field name="inherit_id" ref="hr.view_employee_form" />
            <field name="arch" type="xml">
                <xpath expr="/form/sheet/notebook/page[@string='HR Settings']/group/group[@string='Leaves']" position="replace">
                </xpath>
                <xpath expr="/form/sheet/notebook/page[@string='HR Settings']/group/group[@string='Active']/field[@name='active']" position="after"
                         <field name="working_status" />
                </xpath>
             </field>
        </record>
     </data>
</openerp>

Update: Above code is working well on one machine but not other one!!