Remove unnecessary query param from profile request

This resource request adds a `user_id` query param. But the
corresponding view function doesn't pay any attention to such a
parameter, simply inspecting the authenticated userid to work out whose
profile to provide:

  https://github.com/hypothesis/h/blob/15c39c8b58a8800d7a985c1d29b83fbdb6873266/h/accounts/views.py#L254

h/static/scripts/account/account-controller.coffee

@@ -33,7 +33,7 @@ class AccountController
       $scope.$broadcast 'formState', form.$name, ''  # Update status btn
 
     $scope.tab = 'Account'
-    session.profile({user_id: auth.user}).$promise
+    session.profile().$promise
       .then (result) =>
         $scope.subscriptions = result.subscriptions