[Laszlo-dev] fixme remarks

[Lou Iorio]

The dbk files have lots of remarks followed by a comment that look  
like this:

<remark role="fixme">[unknown tag]</remark>
<!--unknown tag: canvas-->
I suspect these were generated as part of the original conversion to  
docbook,
and were added because these are laszlo tags and not docbook.

I propose we delete these, as I believe they are taken care of by the  
build.

Then we can see how many "real" fixmes there are.

Lou