Remove wrongly used @Singleton

Change-Id: Ie8cc1e27a3ae25876f232cb86d771b0972a4f70f

src/main/java/com/googlesource/gerrit/plugins/simplesubmitrules/api/SubmitConfig.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/simplesubmitrules/api/SubmitConfig.java b/src/main/java/com/googlesource/gerrit/plugins/simplesubmitrules/api/SubmitConfig.java
index a538a57..f82241d 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/simplesubmitrules/api/SubmitConfig.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/simplesubmitrules/api/SubmitConfig.java
@@ -15,12 +15,10 @@
 package com.googlesource.gerrit.plugins.simplesubmitrules.api;
 
 import com.google.common.base.MoreObjects;
-import com.google.inject.Singleton;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
 
-@Singleton
 public class SubmitConfig {
   public Map<String, LabelDefinition> labels;
   public CommentsRules comments;