Remove redundant interface declaration

WebGraphQlRequest already implements ExecutionGraphQlRequest through
its parent class DefaultExecutionGraphQlRequest, making the explicit
interface declaration redundant.

See gh-1218

Signed-off-by: do.vantrinh <[email protected]>

Author: trinhdvt

spring-graphql/src/main/java/org/springframework/graphql/server/WebGraphQlRequest.java

@@ -22,7 +22,6 @@
 import java.util.Locale;
 import java.util.Map;
 
-import org.springframework.graphql.ExecutionGraphQlRequest;
 import org.springframework.graphql.GraphQlRequest;
 import org.springframework.graphql.support.DefaultExecutionGraphQlRequest;
 import org.springframework.http.HttpCookie;
@@ -47,7 +46,7 @@
  * @author Rossen Stoyanchev
  * @since 1.0.0
  */
-public class WebGraphQlRequest extends DefaultExecutionGraphQlRequest implements ExecutionGraphQlRequest {
+public class WebGraphQlRequest extends DefaultExecutionGraphQlRequest {
 
 	private static final MultiValueMap<String, HttpCookie> EMPTY_COOKIES =
 			CollectionUtils.unmodifiableMultiValueMap(new LinkedMultiValueMap<>());