Remove the class User and its tests

as it is not used.

server/lib/python/cartodb_services/test/refactor/core/test_user.py

@@ -1,43 +0,0 @@
-from unittest import TestCase
-from cartodb_services.refactor.core.user import User
-from nose.tools import assert_raises, raises
-
-class TestUser(TestCase):
-
-    def test_can_retrieve_properties(self):
-        u = User('pepito', 'acme')
-        assert u.username == 'pepito'
-        assert u.orgname == 'acme'
-
-    @raises(AttributeError)
-    def test_cannot_modify_properties(self):
-        u = User('pepito')
-        u.username = 'juanito'
-
-    def test_is_org_user_returns_true_for_org_users(self):
-        u = User('pepito', 'acme')
-        assert u.is_org_user == True
-
-    def test_is_org_user_returns_false_for_non_org_users(self):
-        u = User('pepito')
-        assert u.is_org_user == False
-
-    def test_different_users_are_not_equal(self):
-        u1 = User('pepito')
-        u2 = User('juanito')
-        assert u1 != u2
-
-    def test_same_user_are_equal(self):
-        u1 = User('pepito')
-        u2 = User('pepito')
-        assert u1 == u2
-
-        o1 = User('juanito', 'acme')
-        o2 = User('juanito', 'acme')
-        assert o1 == o2
-
-    @raises(AssertionError)
-    def test_raises_exception_if_same_user_is_in_two_orgs(self):
-        u1 = User('juanito', 'acme')
-        u2 = User('juanito', 'some_other_org')
-        u1 == u2