Remove Obtrusive Notice

The following command:

find . -type f -name \*.htm -o -name \*.html -exec perl -i -pe 'BEGIN{undef $/;} s/<!\-\- CHM2WEB \-\->.+?<!\-\- \/CHM2WEB \-\->//smg' '{}' \;

can be run in the same folder that chm2web generated the files in order to remove the obtrusive notice Converted from CHM to HTML with chm2web Pro 2.85 (unicode).