This did not work for me: I found and deleted various things with the organiser, but in the end I was stuck with the ¿module? Standard . Document Objects . Sheet1 with nothing to see there but no way in the organiser to remove it. What I did try from there was Edit, which showed me that this ¿module? contained the code:
Rem Attribute VBA_ModuleType=VBADocumentModule
Option VBASupport 1
I removed that code (but still could not delete the object), did Save in the macro editor, closed that, saved, closed and reopened the document, but it still said it contained macros, and the Sheet1 object was still visible in the organiser. It also now and then seemed to add a Main macro to Sheet1.
The method in W_Whalley’s answer worked, and showed that several more places included the above VBA suport stuff.