diff --git a/src/main/java/org/bench4q/master/domain/entity/plugin/ParamType.java b/src/main/java/org/bench4q/master/domain/entity/plugin/ParamType.java
index 53cf22be..4842464d 100644
--- a/src/main/java/org/bench4q/master/domain/entity/plugin/ParamType.java
+++ b/src/main/java/org/bench4q/master/domain/entity/plugin/ParamType.java
@@ -1,20 +1,16 @@
 package org.bench4q.master.domain.entity.plugin;
 
-import java.util.Set;
 
-import javax.persistence.CascadeType;
 import javax.persistence.Column;
 import javax.persistence.DiscriminatorColumn;
 import javax.persistence.DiscriminatorType;
 import javax.persistence.DiscriminatorValue;
 import javax.persistence.Entity;
-import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
 import javax.persistence.GenerationType;
 import javax.persistence.Id;
 import javax.persistence.Inheritance;
 import javax.persistence.InheritanceType;
-import javax.persistence.OneToMany;
 
 @Entity
 @Inheritance(strategy = InheritanceType.SINGLE_TABLE)