[MIG] purchase_collective: Migration to 16.0

purchase_collective/models/purchase_collective.py

@@ -7,7 +7,6 @@ from operator import attrgetter
 from odoo import models, fields, api, osv, _
 from odoo.exceptions import Warning
 from odoo.tools.safe_eval import safe_eval as eval
-import odoo.addons.decimal_precision as dp
 
 _logger = logging.getLogger(__name__)
 
@@ -59,12 +58,10 @@ class PurchaseCollectiveOrder(models.Model):
         return res
 
             
-    @api.multi 
     def subscribe(self, partner):
         self.message_subscribe(partner_ids=[(partner.id)])
         self.message_post(body=("Order line created by %s" %(partner.name)))
   
-    @api.multi
     def button_details(self):
        context = self.env.context.copy()
        view_id = self.env.ref(