[IMP] add module for hiding unwanted feature

sale_no_optional_product/__manifest__.py

@@ -0,0 +1,30 @@
+# Copyright 2020 Akretion (https://www.akretion.com).
+# @author Sébastien BEAU <sebastien.beau@akretion.com>
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+{
+    "name": "Sale no optional product",
+    "summary": "Hide optional product",
+    "version": "12.0.1.0.0",
+    "category": "Usability",
+    "website": "www.akretion.com",
+    "author": " Akretion",
+    "license": "AGPL-3",
+    "application": False,
+    "installable": True,
+    "external_dependencies": {
+        "python": [],
+        "bin": [],
+    },
+    "depends": [
+        "sale_management",
+    ],
+    "data": [
+        "views/product_template_view.xml",
+        "views/sale_order_view.xml",
+    ],
+    "demo": [
+    ],
+    "qweb": [
+    ]
+}

sale_no_optional_product/views/product_template_view.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+
+<record id="product_template_view_form" model="ir.ui.view">
+    <field name="model">product.template</field>
+    <field name="inherit_id" ref="sale.product_template_form_view"/>
+    <field name="arch" type="xml">
+        <group name="options" position="attributes">
+            <attribute name="invisible"/>
+        </group>
+    </field>
+</record>
+
+</odoo>

sale_no_optional_product/views/sale_order_view.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<odoo>
+
+<record id="sale_order_form_quote" model="ir.ui.view">
+    <field name="model">sale.order</field>
+    <field name="inherit_id" ref="sale_management.sale_order_form_quote"/>
+    <field name="arch" type="xml">
+        <xpath expr="//field[@name='sale_order_option_ids']/.." position="attributes">
+            <attribute name="invisible">1</attribute>
+        </xpath>
+    </field>
+</record>
+
+</odoo>