thank you muhammed you saved my day 

In Odoo 14, you can inherit the delete button in a few different ways. Here are two options:

Using the ir.actions.act_window model:

You can override the ir.actions.act_window model and define a new action for the delete button. Then, you can specify the new action in the form_view_id or tree_view_id field in your view. Here's an example of how you might do this:

from odoo import api, fields, models

class MyDeleteAction(models.Model):

    _inherit = 'ir.actions.act_window'

    def delete(self):

        # Add your custom delete code here

        return super().delete()

class MyModel(models.Model):

    _name = 'my.model'

    name = fields.Char(string='Name')

    def action_delete(self):

        return {

            'name': 'Delete',

            'type': 'ir.actions.act_window',

            'res_model': self._name,

            'view_mode': 'form',

            'view_type': 'form',

            'target': 'new',

            'context': {'delete_custom': True},

            'custom_button_delete': True,

        }

Using JavaScript:

You can also override the delete button using JavaScript. To do this, you'll need to define a new button in your view and then use JavaScript to attach the delete action to the button. Here's an example of how you might do this:

    odoo.define('my_module.delete_button', function (require) {

        "use strict";

        var ListController = require('web.ListController');

        ListController.include({

            renderButtons: function () {

                this._super.apply(this, arguments);

                if (this.$buttons) {

                    this.$buttons.on('click', '.o_list_button_delete', this._onDeleteRecord.bind(this));

                }

            },

            _onDeleteRecord: function (event) {

                event.preventDefault();

                // Add your custom delete code here

                this._super.apply(this, arguments);

            },

        });

    });