Remove unused 'node.client' setting

core/src/main/java/org/elasticsearch/node/Node.java

@@ -131,8 +131,6 @@ public class Node implements Closeable {
 
     public static final Setting<Boolean> WRITE_PORTS_FIELD_SETTING =
         Setting.boolSetting("node.portsfile", false, Property.NodeScope);
-    public static final Setting<Boolean> NODE_CLIENT_SETTING =
-        Setting.boolSetting("node.client", false, Property.NodeScope);
     public static final Setting<Boolean> NODE_DATA_SETTING = Setting.boolSetting("node.data", true, Property.NodeScope);
     public static final Setting<Boolean> NODE_MASTER_SETTING =
         Setting.boolSetting("node.master", true, Property.NodeScope);