fixed warnings

src/main/java/oracle/demo/graphql/CountryGraphQLApi.java

@@ -1,6 +1,5 @@
 package oracle.demo.graphql;
 
-import java.util.ArrayList;
 import java.util.List;
 
 import javax.enterprise.context.ApplicationScoped;

src/main/java/oracle/demo/jpa/CountryDAO.java

@@ -7,7 +7,6 @@
 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceContext;
 import javax.transaction.Transactional;
-import javax.xml.namespace.QName;
 
 import org.eclipse.microprofile.opentracing.Traced;
 

src/test/java/oracle/demo/graphql/CountryGraphQLApiTest.java

@@ -1,8 +1,6 @@
 package oracle.demo.graphql;
 
 
-import java.util.Objects;
-
 import javax.inject.Inject;
 import javax.json.JsonArray;
 import javax.json.JsonObject;

src/test/java/oracle/demo/reactive/ReactiveResourceTest.java

@@ -3,7 +3,6 @@
 import java.util.concurrent.TimeUnit;
 
 import javax.inject.Inject;
-import javax.json.JsonArray;
 import javax.json.JsonObject;
 import javax.ws.rs.client.Entity;
 import javax.ws.rs.client.WebTarget;