diff --git a/odoo/addons/base/models/ir_ui_menu.py b/odoo/addons/base/models/ir_ui_menu.py
index 40657be0d6f..a77d4971fe4 100644
--- a/odoo/addons/base/models/ir_ui_menu.py
+++ b/odoo/addons/base/models/ir_ui_menu.py
@@ -21,10 +21,6 @@ class IrUiMenu(models.Model):
     _order = "sequence,id"
     _parent_store = True
 
-    def __init__(self, *args, **kwargs):
-        super(IrUiMenu, self).__init__(*args, **kwargs)
-        self.pool['ir.model.access'].register_cache_clearing_method(self._name, 'clear_caches')
-
     name = fields.Char(string='Menu', required=True, translate=True)
     active = fields.Boolean(default=True)
     sequence = fields.Integer(default=10)
diff --git a/odoo/addons/base/tests/test_deprecation.py b/odoo/addons/base/tests/test_deprecation.py
index 9e74e4a5263..6b991843ec8 100644
--- a/odoo/addons/base/tests/test_deprecation.py
+++ b/odoo/addons/base/tests/test_deprecation.py
@@ -6,6 +6,7 @@ from odoo.tests.common import TransactionCase, tagged
 
 DEPRECATED_MODEL_ATTRIBUTES = [
     'view_init',
+    '_needaction',
 ]
 
 
diff --git a/odoo/api.py b/odoo/api.py
index 841cf1cdf58..82a3f45fef9 100644
--- a/odoo/api.py
+++ b/odoo/api.py
@@ -74,10 +74,6 @@ class Meta(type):
             if not key.startswith('__') and callable(value):
                 # make the method inherit from decorators
                 value = propagate(getattr(parent, key, None), value)
-
-                if (getattr(value, '_api', None) or '').startswith('cr'):
-                    _logger.warning("Deprecated method %s.%s in module %s", name, key, attrs.get('__module__'))
-
                 attrs[key] = value
 
         return type.__new__(meta, name, bases, attrs)
diff --git a/odoo/models.py b/odoo/models.py
index 32d4fed2829..221d63b9d70 100644
--- a/odoo/models.py
+++ b/odoo/models.py
@@ -46,7 +46,6 @@ import dateutil.relativedelta
 import psycopg2, psycopg2.extensions
 from lxml import etree
 from lxml.builder import E
-from psycopg2.extensions import AsIs
 
 import odoo
 from . import SUPERUSER_ID
@@ -55,7 +54,7 @@ from . import tools
 from .exceptions import AccessError, MissingError, ValidationError, UserError
 from .osv.query import Query
 from .tools import frozendict, lazy_classproperty, ormcache, \
-                   Collector, LastOrderedSet, OrderedSet, IterableGenerator, \
+                   LastOrderedSet, OrderedSet, IterableGenerator, \
                    groupby, discardattr, partition
 from .tools.config import config
 from .tools.func import frame_codeinfo
@@ -67,10 +66,9 @@ from .tools import unique
 from .tools.lru import LRU
 
 _logger = logging.getLogger(__name__)
-_schema = logging.getLogger(__name__ + '.schema')
 _unlink = logging.getLogger(__name__ + '.unlink')
 
-regex_order = re.compile('^(\s*([a-z0-9:_]+|"[a-z0-9:_]+")(\s+(desc|asc))?\s*(,|$))+(?<!,)$', re.I)
+regex_order = re.compile(r'^(\s*([a-z0-9:_]+|"[a-z0-9:_]+")(\s+(desc|asc))?\s*(,|$))+(?<!,)$', re.I)
 regex_object_name = re.compile(r'^[a-z0-9_.]+$')
 regex_pg_name = re.compile(r'^[a-z_][a-z0-9_$]*$', re.I)
 regex_field_agg = re.compile(r'(\w+)(?::(\w+)(?:\((\w+)\))?)?')
@@ -119,10 +117,6 @@ def check_method_name(name):
     if regex_private.match(name):
         raise AccessError(_('Private methods (such as %s) cannot be called remotely.') % (name,))
 
-def same_name(f, g):
-    """ Test whether functions ``f`` and ``g`` are identical or have the same name """
-    return f == g or getattr(f, '__name__', 0) == getattr(g, '__name__', 1)
-
 def fix_import_export_id_paths(fieldname):
     """
     Fixes the id fields in import and exports, and splits field paths
@@ -515,7 +509,6 @@ class BaseModel(metaclass=MetaModel):
     _date_name = 'date'         #: field to use for default calendar view
     _fold_name = 'fold'         #: field to determine folded groups in kanban views
 
-    _needaction = False         # whether the model supports "need actions" (Old API)
     _translate = True           # False disables translations export for this model (Old API)
     _check_company_auto = False
     """On write and create, call ``_check_company`` to ensure companies
@@ -662,10 +655,6 @@ class BaseModel(metaclass=MetaModel):
         ModelClass.pool = pool
         pool[name] = ModelClass
 
-        # backward compatibility: instantiate the model, and initialize it
-        model = object.__new__(ModelClass)
-        model.__init__(pool, cr)
-
         return ModelClass
 
     @classmethod
@@ -827,15 +816,6 @@ class BaseModel(metaclass=MetaModel):
         cls._onchange_methods = methods
         return methods
 
-    def __new__(cls):
-        # In the past, this method was registering the model class in the server.
-        # This job is now done entirely by the metaclass MetaModel.
-        return None
-
-    def __init__(self, pool, cr):
-        """ Deprecated method to initialize the model. """
-        pass
-
     def _is_an_ordinary_table(self):
         return self.pool.is_an_ordinary_table(self)
 
@@ -1033,9 +1013,6 @@ class BaseModel(metaclass=MetaModel):
 
         return lines
 
-    # backward compatibility
-    __export_rows = _export_rows
-
     def export_data(self, fields_to_export):
         """ Export fields for selected objects