From topic names, you should select "paratext_no_num" as the
"Topic name pattern".
If you are still seeing the autonumbering, it is possible you
have selected the option "Convert Autonumbers to HTML list".
RoboHelp conversion to HTML list happens earlier in the processing
sequence.
In order to remove the autonumbering, you can select
FrameMaker styles for which you want to "Ignore AutoNumber
Properties".
Please note for TOC import from Framemaker, you should
"Ignore AutoNumber Properties" for FrameMaker styles which are used
to generate TOC in FrameMaker.