Update:
This code, as pointed out below, will not work if the text in the comment contains any asterisks.
See
How do I use a regular expression to strip C style comments from a file? for a regexp that will work in all cases.
I am pretty sure that this would work:
$text =~ s|\/\*[^\*]*\*\/||;
Breaking that down a bit (i can appreciate how it might just look like a bunch of asterisks and slashes, but i guess that's probably a good thing as far as your obfuscation goes ;-):
$text =~ s|
\/\* # '/*', escaped
[^\*]* # 0 or more non-'*' characters
\*\/ # '*/', escaped
||x;