product_variant_usability/views/product_view.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>
        
<record id="product_template_view_form" model="ir.ui.view">
    <field name="model">product.template</field>
    <field name="inherit_id" ref="product.product_template_only_form_view"/>
    <field name="priority" eval="64"/>
    <field name="arch" type="xml">
        <field name="attribute_line_ids" position="after">
            <field name="product_variant_ids" nolabel="1" domain="['|', ('active', '=', False), ('active', '=', True)]" required="0">
                <tree create="0">
                    <field name="default_code"/>
                    <field name="attribute_value_ids" widget="many2many_tags"/>
                    <field name="qty_available"/>
                    <field name="active" invisible="1"/>
                    <button type="object"
                            name="button_activate"
                            attrs="{'invisible': [('active','=',True)]}"
                            icon="gtk-stop"/>
                    <button type="object"
                            name="button_deactivate"
                            attrs="{'invisible': [('active','=',False)]}" 
                            icon="gtk-apply"/>
                </tree>
            </field>
        </field>
        <xpath expr="//field[@name='product_variant_count']/../.." position="attributes">
            <attribute name="invisible">1</attribute>
        </xpath>
    </field>
</record>

    </data>
</openerp>