The xdmp:document-delete function deletes
a document and all of its properties, except, when
directory-creation is set to automatic or
manual-enforced, the directory property; it does
not delete a directory with the same URI as the document being deleted unless
directory-creation is set to manual.
To delete a directory, use the xdmp:directory-delete function.
If a document does not exist at the specified URI,
xdmp:document-delete throws an error.
declareUpdate();
xdmp.documentDelete("example.xml");