Documentation/rest-api-projects: update AccessCheckInfo spec

As the project is part of the URL path, the endpoint no longer returns
404 inside the response entity.

Change-Id: I0fa5121179675ff6a3c9986600d699d18eb01001

Documentation/rest-api-projects.txt

diff --git a/Documentation/rest-api-projects.txt b/Documentation/rest-api-projects.txt
index 2a9dcee..2d74e10 100644
--- a/Documentation/rest-api-projects.txt
+++ b/Documentation/rest-api-projects.txt
@@ -2922,7 +2922,7 @@
 |=========================================
 |Field Name                  ||Description
 |`status`                    ||The HTTP status code for the access.
-200 means success, 403 means denied and 404 means the project does not exist.
+200 means success and 403 means denied.
 |`message`                   |optional|A clarifying message if `status` is not 200.
 |=========================================