veyron/services/wsprd/app: Undo test hack.

Review comments in the commit that motivated this hack have
rendered this hack unnecessary.
Background: https://veyron-review.googlesource.com/#/c/5401/

Change-Id: I02faf6f10e775fd24533ed35645c4a6e6ecd1e61
diff --git a/services/wsprd/app/app_test.go b/services/wsprd/app/app_test.go
index 97046fd..51243aa 100644
--- a/services/wsprd/app/app_test.go
+++ b/services/wsprd/app/app_test.go
@@ -4,7 +4,6 @@
 	"encoding/json"
 	"fmt"
 	"reflect"
-	"strings"
 	"testing"
 
 	"veyron.io/veyron/veyron2"
@@ -585,7 +584,7 @@
 						"Handle": 2.0,
 						"Names":  names,
 					},
-					"localEndpoint":  hackEndpointStringForOldSecurityModel(endpoint.String()),
+					"localEndpoint":  endpoint.String(),
 					"remoteEndpoint": "remoteEndpoint",
 				},
 			},
@@ -641,7 +640,7 @@
 						"Handle": 4.0,
 						"Names":  names,
 					},
-					"localEndpoint":  hackEndpointStringForOldSecurityModel(endpoint.String()),
+					"localEndpoint":  endpoint.String(),
 					"remoteEndpoint": "remoteEndpoint",
 				},
 			},
@@ -850,12 +849,3 @@
 		}
 	}
 }
-
-// TODO(ashankar): Remove this when WSPRD is switched to using the new security API.
-func hackEndpointStringForOldSecurityModel(str string) string {
-	suffix := "@4@@"
-	if strings.HasSuffix(str, suffix) {
-		return strings.TrimSuffix(str, suffix) + "@2@@"
-	}
-	return str
-}