Remove the redundant brackets

Signed-off-by: kaido207 <kaido.hiroki@fujitsu.com>

appserver/admingui/common/src/main/java/org/glassfish/admingui/common/handlers/SecurityHandler.java

@@ -278,7 +278,7 @@ public static void saveRealm(HandlerContext handlerCtx) {
                 continue;
             }
             sb.append(oneProp.get("name")).append("=");
-            String value = ((String) oneProp.get("value"));
+            String value = (String) oneProp.get("value");
             value = UtilHandlers.escapePropertyValue(value);
             sb.append(value).append(":");
         }