Fix JSON errors in /projects REST API documentation

The JSON in some example responses was invalid as it contained
extraneous commas in some places.

Bug: issue 3107
Change-Id: I118fc8fb9cf2db30e9d71d6a44d892a37e5c9f27
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

Documentation/rest-api-projects.txt

@@ -39,7 +39,7 @@ by project name.
       "description": "GNU parser generator"
     },
     "external/gcc": {
-      "id": "external%2Fgcc",
+      "id": "external%2Fgcc"
     },
     "external/openssl": {
       "id": "external%2Fopenssl",
@@ -165,10 +165,10 @@ List all projects that start with `platform/`:
   )]}'
   {
     "platform/drivers": {
-      "id": "platform%2Fdrivers",
+      "id": "platform%2Fdrivers"
     },
     "platform/tools": {
-      "id": "platform%2Ftools",
+      "id": "platform%2Ftools"
     }
   }
 ----
@@ -198,10 +198,10 @@ List all projects that match regex `test.*project`:
   )]}'
   {
     "test/some-project": {
-      "id": "test%2Fsome-project",
+      "id": "test%2Fsome-project"
     },
     "test/some-other-project": {
-      "id": "test%2Fsome-other-project",
+      "id": "test%2Fsome-other-project"
     }
   }
 
@@ -250,10 +250,10 @@ List all projects that match substring `test/`:
   )]}'
   {
     "test/some-project": {
-      "id": "test%2Fsome-project",
+      "id": "test%2Fsome-project"
     },
     "some-path/test/some-other-project": {
-      "id": "some-path%2Ftest%2Fsome-other-project",
+      "id": "some-path%2Ftest%2Fsome-other-project"
     }
   }
 ----