Not that I know of, but you should be able to write a VBScript to edit those
out and re-save the file after the download is done.

Basically, you can instruct the DOS command FOR /R to recursively go into all
folders under a main folder (where your mirror is stored) find all the *.htm
or *.html files and then pass each one to the VBScript file, which will edit
out the comments and then re-save the files under the same name.

Not too hard.