[#1857] Update utilities classes

Author: DavideD

hibernate-reactive-core/src/main/java/org/hibernate/reactive/util/impl/CompletionStages.java

@@ -82,6 +82,10 @@ public static <T> CompletionStage<T> nullFuture() {
 		return (CompletionStage<T>) VOID;
 	}
 
+	public static <T> CompletionStage<T> nullFuture(Void v) {
+		return nullFuture();
+	}
+
 	public static <T> CompletionStage<T> completedFuture(T value) {
 		return CompletableFuture.completedFuture( value );
 	}
@@ -110,13 +114,6 @@ public static <T extends Throwable, Ret> Ret returnOrRethrow(Throwable x, Ret re
 		return result;
 	}
 
-	/**
-	 * For CompletionStage#handle when we don't care about errors
-	 */
-	public static <U> U ignoreErrors(Void unused, Throwable throwable) {
-		return null;
-	}
-
 	public static void logSqlException(Throwable t, Supplier<String> message, String sql) {
 		if ( t != null ) {
 			LOG.failedToExecuteStatement( sql, message.get(), t );
@@ -225,10 +222,6 @@ public static <T> CompletionStage<Void> loop(Iterator<T> iterator, IntBiPredicat
 		return voidFuture();
 	}
 
-	public static <U> U nullFuture(Void unused) {
-		return null;
-	}
-
 	public static <R, T extends Throwable> CompletionStageHandler<R, T> handle(R result, T throwable) {
 		return new CompletionStageHandler<>( result, throwable );
 	}