[REM] stock: remove dead code

In views of stock inventory line,
the view with the id "stock_inventory_line_tree" was not used.
Then remove it, and rename the "stock_inventory_line_tree2"
into "stock_inventory_line_tree".

task-2115194

addons/stock/models/stock_inventory.py

@@ -163,7 +163,7 @@ class Inventory(models.Model):
         self.ensure_one()
         action = {
             'type': 'ir.actions.act_window',
-            'views': [(self.env.ref('stock.stock_inventory_line_tree2').id, 'tree')],
+            'views': [(self.env.ref('stock.stock_inventory_line_tree').id, 'tree')],
             'view_mode': 'tree',
             'name': _('Inventory Lines'),
             'res_model': 'stock.inventory.line',
@@ -357,7 +357,6 @@ class InventoryLine(models.Model):
 
     @api.onchange('product_id', 'location_id', 'product_uom_id', 'prod_lot_id', 'partner_id', 'package_id')
     def _onchange_quantity_context(self):
-        product_qty = False
         if self.product_id:
             self.product_uom_id = self.product_id.uom_id
         if self.product_id and self.location_id and self.product_id.uom_id.category_id == self.product_uom_id.category_id:  # TDE FIXME: last part added because crash

addons/stock/views/stock_inventory_views.xml

@@ -4,19 +4,6 @@
     <record id="stock_inventory_line_tree" model="ir.ui.view">
         <field name="name">stock.inventory.line.tree</field>
         <field name="model">stock.inventory.line</field>
-        <field name="arch" type="xml">
-            <tree string="Stock Inventory Lines">
-                <field name="product_id"/>
-                <field name="product_qty"/>
-                <field name="product_uom_id" groups="uom.group_uom"/>
-                <field name="location_id" options="{'no_create': True}" groups="stock.group_stock_multi_locations"/>
-            </tree>
-        </field>
-    </record>
-
-    <record id="stock_inventory_line_tree2" model="ir.ui.view">
-        <field name="name">stock.inventory.line.tree2</field>
-        <field name="model">stock.inventory.line</field>
         <field name="arch" type="xml">
             <tree default_order="location_id,product_id" editable="top" string="Inventory Details" js_class="inventory_validate_button"
                   decoration-danger="product_qty != theoretical_qty"