Fix invalid json example in POST access endpoint (remove array)

Bug: Issue 10106
Change-Id: I0f8a33ca57bc79648beea3ac047e1c2d2002217a
diff --git a/Documentation/rest-api-projects.txt b/Documentation/rest-api-projects.txt
index 98a8dc9..27d933f 100644
--- a/Documentation/rest-api-projects.txt
+++ b/Documentation/rest-api-projects.txt
@@ -1085,21 +1085,19 @@
   Content-Type: application/json; charset=UTF-8
 
   {
-    "remove": [
-      {
-        "refs/*": {
-          "permissions": {
-            "read": {
-              "rules": {
-                "c2ce4749a32ceb82cd6adcce65b8216e12afb41c": {
-                  "action": "ALLOW"
-                }
+    "remove": {
+      "refs/*": {
+        "permissions": {
+          "read": {
+            "rules": {
+              "c2ce4749a32ceb82cd6adcce65b8216e12afb41c": {
+                "action": "ALLOW"
               }
             }
           }
         }
       }
-    ]
+    }
   }
 ----