registration.py: Remove first_in_realm from accounts_register.

The parent commit implies first_in_realm == realm_creation.

zerver/tests/test_signup.py

@@ -276,7 +276,7 @@ class LoginTest(ZulipTestCase):
         with queries_captured() as queries:
             self.register(self.nonreg_email('test'), "test")
         # Ensure the number of queries we make is not O(streams)
-        self.assert_length(queries, 68)
+        self.assert_length(queries, 67)
         user_profile = self.nonreg_user('test')
         self.assertEqual(get_session_dict_user(self.client.session), user_profile.id)
         self.assertFalse(user_profile.enable_stream_desktop_notifications)

zerver/views/registration.py

@@ -199,7 +199,6 @@ def accounts_register(request):
 
         full_name = form.cleaned_data['full_name']
         short_name = email_to_username(email)
-        first_in_realm = len(UserProfile.objects.filter(realm=realm, is_bot=False)) == 0
 
         timezone = u""
         if 'timezone' in request.POST and request.POST['timezone'] in get_all_timezones():
@@ -221,7 +220,7 @@ def accounts_register(request):
 
         send_initial_pms(user_profile)
 
-        if first_in_realm:
+        if realm_creation:
             do_change_is_admin(user_profile, True)
             setup_initial_private_stream(user_profile)
             send_initial_realm_messages(realm)