Removes unused class

Author: felixscheinost

grails-datastore-gorm-hibernate5/src/test/groovy/org/grails/orm/hibernate/compiler/HibernateEntityTransformationSpec.groovy

@@ -154,18 +154,4 @@ class MyEntity {
         then:"The value is changed"
         myEntity.name == 'changed'
     }
-}
-@grails.gorm.hibernate.annotation.ManagedEntity
-class MyTest {
-    String name
-    String lastName
-    int age
-
-    String getLastName() {
-        return this.lastName
-    }
-
-    void setLastName(String name) {
-        this.lastName = name
-    }
 }