diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 6074f6fe841..5f45496b950 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -1227,19 +1227,6 @@ function dol_mktime($hour,$minute,$second,$month,$day,$year,$gm=false,$check=1)
 	else
 	{
 		dol_print_error('','PHP version must be 5.3+');
-		/*
-		$usealternatemethod=false;
-		if ($year <= 1970) $usealternatemethod=true;		// <= 1970
-		if ($year >= 2038) $usealternatemethod=true;		// >= 2038
-
-		if ($usealternatemethod || $gm)	// Si time gm, seule adodb peut convertir
-		{
-			$date=adodb_mktime($hour,$minute,$second,$month,$day,$year,0,$gm);
-		}
-		else
-		{
-			$date=mktime($hour,$minute,$second,$month,$day,$year);
-		}*/
 		return '';
 	}
 }