[FIX] product_form: remove hs code and duplicate internal note

The hs code was only used in a single view, hence it was decided that we
wouldn't keep it

addons/delivery/__manifest__.py

@@ -20,7 +20,6 @@ invoices from picking, the system is able to add and compute the shipping line.
         'views/product_packaging_view.xml',
         'views/delivery_view.xml',
         'views/partner_view.xml',
-        'views/product_template_view.xml',
         'data/delivery_data.xml',
         'data/mail_template_data.xml',
         'views/report_shipping.xml',

addons/delivery/models/__init__.py

@@ -4,7 +4,6 @@
 from . import res_config_settings
 from . import delivery_carrier
 from . import delivery_grid
-from . import product_template
 from . import product_packaging
 from . import sale_order
 from . import partner

addons/delivery/models/product_template.py

-# -*- coding: utf-8 -*-
-# Part of Odoo. See LICENSE file for full copyright and licensing details.
-
-from odoo import models, fields
-
-
-class ProductTemplate(models.Model):
-    _inherit = 'product.template'
-
-    hs_code = fields.Char(string="HS Code", help="Standardized code for international shipping and goods declaration")

addons/delivery/views/product_template_view.xml

-<?xml version="1.0" encoding="utf-8"?>
-<odoo>
-
-<record model="ir.ui.view" id="delivery.product_template_hs_code">
-    <field name="name">product.template.form.hs_code</field>
-    <field name="model">product.template</field>
-    <field name="inherit_id" ref="product.product_template_form_view"/>
-    <field name="arch" type="xml">
-        <xpath expr="//group[@name='accounting']" position="inside">
-            <group string="GST" name="gst">
-                <field name="hs_code"/>
-            </group>
-        </xpath>
-    </field>
-</record>
-
-</odoo>

addons/l10n_in/views/product_template_view.xml

 <?xml version="1.0" encoding="utf-8"?>
 <odoo>
 
-    <record model="ir.ui.view" id="l10n_in.product_template_hs_code">
-        <field name="name">l10n_in.product.template.form.hs_code</field>
+    <record model="ir.ui.view" id="l10n_in.product_template_hsn_code">
+        <field name="name">l10n_in.product.template.form.hsn_code</field>
         <field name="model">product.template</field>
         <field name="inherit_id" ref="product.product_template_form_view"/>
         <field name="arch" type="xml">

addons/product/views/product_views.xml

@@ -64,11 +64,6 @@
                             <group string="Internal Notes">
                                 <field name="description" nolabel="1" placeholder="This note is only for internal purposes."/>
                             </group>
-                            <group name="description_internal">
-                                <group string="Description for Internal" colspan="4">
-                                    <field name="description" nolabel="1" placeholder="This note is only for internal purposes."/>
-                                </group>
-                            </group>
                         </page>
                         <page string="Sales" attrs="{'invisible':[('sale_ok','=',False)]}" name="sales" invisible="1">
                             <group name="sale">