[REM] product: unused company fallback logic

This method & logic is not used nor necessary anymore with
the multi-company fixes and improvements done in the recent years.
* All requests coming from website are automatically done in the website
company.
* check_company restrictions forbid the use of records from different companies
* multi-company security rules restrict the access to records from the current
company.

Part-of: odoo/odoo#121986

addons/product/models/product_template.py

@@ -1322,34 +1322,6 @@ class ProductTemplate(models.Model):
                     return _("There are no possible combination.")
                 combination = combination[:-1]
 
-    def _get_current_company(self, **kwargs):
-        """Get the most appropriate company for this product.
-
-        If the company is set on the product, directly return it. Otherwise,
-        fallback to a contextual company.
-
-        :param kwargs: kwargs forwarded to the fallback method.
-
-        :return: the most appropriate company for this product
-        :rtype: recordset of one `res.company`
-        """
-        self.ensure_one()
-        return self.company_id or self._get_current_company_fallback(**kwargs)
-
-    def _get_current_company_fallback(self, **kwargs):
-        """Fallback to get the most appropriate company for this product.
-
-        This should only be called from `_get_current_company` but is defined
-        separately to allow override.
-
-        The final fallback will be the current user's company.
-
-        :return: the fallback company for this product
-        :rtype: recordset of one `res.company`
-        """
-        self.ensure_one()
-        return self.env.company
-
     def _get_placeholder_filename(self, field):
         image_fields = ['image_%s' % size for size in [1920, 1024, 512, 256, 128]]
         if field in image_fields: