Do not add history to unnecessary model

d38610e26ede added history to all related models but it is not necessary as
only the One2Many and Many2Many are needed.
If the target of a Many2One or a Reference has been deleted meanwhile then the
record may not be readable at that date.

Closes #13768

modules/sale_opportunity/__init__.py

@@ -3,9 +3,7 @@
 
 from trytond.pool import Pool
 
-from . import (
-    account, company, configuration, opportunity, opportunity_reporting, party,
-    product, sale)
+from . import configuration, opportunity, opportunity_reporting, party, sale
 
 
 def register():
@@ -22,14 +20,6 @@ def register():
         configuration.Configuration,
         configuration.ConfigurationSequence,
         sale.Sale,
-        party.Party,
-        party.Address,
-        account.PaymentTerm,
-        account.PaymentTermLine,
-        product.Template,
-        product.Product,
-        company.Company,
-        company.Employee,
         module='sale_opportunity', type_='model')
     Pool.register(
         party.Replace,

modules/sale_opportunity/account.py

@@ -1,13 +0,0 @@
-# This file is part of Tryton.  The COPYRIGHT file at the top level of
-# this repository contains the full copyright notices and license terms.
-from trytond.pool import PoolMeta
-
-
-class PaymentTerm(metaclass=PoolMeta):
-    __name__ = 'account.invoice.payment_term'
-    _history = True
-
-
-class PaymentTermLine(metaclass=PoolMeta):
-    __name__ = 'account.invoice.payment_term.line'
-    _history = True

modules/sale_opportunity/company.py

@@ -1,13 +0,0 @@
-# This file is part of Tryton.  The COPYRIGHT file at the top level of
-# this repository contains the full copyright notices and license terms.
-from trytond.pool import PoolMeta
-
-
-class Company(metaclass=PoolMeta):
-    __name__ = 'company.company'
-    _history = True
-
-
-class Employee(metaclass=PoolMeta):
-    __name__ = 'company.employee'
-    _history = True

modules/sale_opportunity/party.py

@@ -3,16 +3,6 @@
 from trytond.pool import PoolMeta
 
 
-class Party(metaclass=PoolMeta):
-    __name__ = 'party.party'
-    _history = True
-
-
-class Address(metaclass=PoolMeta):
-    __name__ = 'party.address'
-    _history = True
-
-
 class Replace(metaclass=PoolMeta):
     __name__ = 'party.replace'
 

modules/sale_opportunity/product.py

@@ -1,13 +0,0 @@
-# This file is part of Tryton.  The COPYRIGHT file at the top level of
-# this repository contains the full copyright notices and license terms.
-from trytond.pool import PoolMeta
-
-
-class Template(metaclass=PoolMeta):
-    __name__ = 'product.template'
-    _history = True
-
-
-class Product(metaclass=PoolMeta):
-    __name__ = 'product.product'
-    _history = True

modules/sale_opportunity/tryton.cfg

@@ -1,14 +1,12 @@
 [tryton]
 version=7.5.0
 depends:
-    account
     account_invoice
     company
     currency
     party
     product
     sale
-    stock
 xml:
     opportunity.xml
     party.xml