Tidy up (#41)

Remove 402 from ListAssets as meaningless

Previous release did not work probaly because of testing the
CI pipeline with authentication enabled.

AB#10228

README.md

@@ -80,6 +80,3 @@ The protos can be included exactly as they are found from a clone of go-datatrai
         DATATRAILS_COMMON_API="../../go-datatrails-common-api"
 
 It is necessary however to run `task apis:bootsrap` after cloning go-datatrails-common
-
-Ignore this comment
-

datatrails-common-api/assets/v2/assets/service.proto

@@ -69,12 +69,6 @@ service Assets {
                     description: "Returned when the user is not authenticated to the system."
                 }
             }
-            responses: {
-                key: "402";
-                value: {
-                    description: "Returned when the user's quota of Assets for the given proof mechanism has been reached."
-                }
-            }
             responses: {
                 key: "403";
                 value: {