Update FeatureProbeDemo.java

Author: jianggang

src/main/java/com/featureprobe/sdk/example/FeatureProbeDemo.java

@@ -32,7 +32,6 @@ public static void main(String[] args) throws IOException {
 
         // Create one user.
         FPUser user = new FPUser()
-            .stableRollout("00001")          // key is for percentage rollout, normally use userId as key
             .with("userId", "00001");        // "userId" is used in rules, should be filled in.
 
         // Get toggle result for this user.