Hi Astrid,
you can blame me for this :-)
Yes, we have removed the clip arts in FrameMaker 2019. When reviewing the whole of FrameMaker for "legacy stuff", they were among the first things, I suggested to remove. I also interviewed many long term users and asked in several mailing lists/user forums, if anyone is using these old clip arts (created in 1993). 100% answered, they never used them because they are too old and do not fit into the modern look and feel of their documentation and encouraged us to remove them.
If you need them, please send me a PM, with your e-mail address, and I'll be happy to send them to you.
Kind regards,
Stefan Gentz