Remove unused test json

acme4j-client/src/test/resources/json.properties

@@ -48,12 +48,6 @@ modifyRegistrationResponse = \
   {"agreement":"http://example.com/agreement.pdf",\
    "contact":["mailto:foo2@example.com"]}
 
-recoverRegistration = \
-  {"resource":"recover-reg",\
-   "method":"contact",\
-   "base":"https://example.com/acme/some-location",\
-   "contact":["mailto:foo@example.com"]}
-
 updateRegistration = \
   {"resource":"reg"}