[hibernate#997] Remove duplicated close method in the Session

It's already defined in the Closable interface

Author: DavideD

hibernate-reactive-core/src/main/java/org/hibernate/reactive/mutiny/Mutiny.java

@@ -1099,12 +1099,6 @@ <R> Query<R> createNativeQuery(String queryString, ResultSetMapping<R> resultSet
 		 */
 		Transaction currentTransaction();
 
-		/**
-		 * Close the reactive session and release the underlying database
-		 * connection.
-		 */
-		Uni<Void> close();
-
 		/**
 		 * @return false if {@link #close()} has been called
 		 */

hibernate-reactive-core/src/main/java/org/hibernate/reactive/stage/Stage.java

@@ -1100,12 +1100,6 @@ <R> Query<R> createNativeQuery(String queryString,
 		 */
 		Transaction currentTransaction();
 
-		/**
-		 * Close the reactive session and release the underlying database
-		 * connection.
-		 */
-		CompletionStage<Void> close();
-
 		/**
 		 * @return false if {@link #close()} has been called
 		 */