[libxml2] Revert "Make schema validation fail with multiple top-level elements"

[Nick Wellnhofer <nwellnhof src gnome org>]

commit c35628a24c33c6c3d2d9a9998bcc90e54b1757ea
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Sat Jan 15 18:18:22 2022 +0100

    Revert "Make schema validation fail with multiple top-level elements"
    
    This reverts commit 4f2aee18f6e2d40e58eb224f4f7935dc2400fe25.
    
    Fixes #305.

 xmlschemas.c | 4 ----
 1 file changed, 4 deletions(-)
---
diff --git a/xmlschemas.c b/xmlschemas.c
index 1efd0962..6b01fe26 100644
--- a/xmlschemas.c
+++ b/xmlschemas.c
@@ -28136,10 +28136,6 @@ xmlSchemaVDocWalk(xmlSchemaValidCtxtPtr vctxt)
        VERROR(1, NULL, "The document has no document element");
        return (1);
     }
-    for (node = valRoot->next; node != NULL; node = node->next) {
-        if (node->type == XML_ELEMENT_NODE)
-            VERROR(1, NULL, "The document has more than one top element");
-    }
     vctxt->depth = -1;
     vctxt->validationRoot = valRoot;
     node = valRoot;