[IMP] product_margin: remove create and edit from views

Create and Edit Buttons are not needed on views being opened from
the Product Margin report

Fixes odoo/odoo#39069

closes odoo/odoo#39072

Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>

addons/product_margin/wizard/product_margin.py

@@ -20,7 +20,7 @@ class ProductMargin(models.TransientModel):
 
     def action_open_window(self):
         self.ensure_one()
-        context = dict(self.env.context or {})
+        context = dict(self.env.context, create=False, edit=False)
 
         def ref(module, xml_id):
             proxy = self.env['ir.model.data']