You will need to change a template, so if you can edit a file and know FTP then you can amend this
create a directory on your theme called ‘bbpress’
ie wp-content/themes/%your-theme-name%/bbpress
where %your-theme-name% is the name of your theme
find
wp-content/plugins/bbpress/templates/default/bbpress/loop-single-topic.php
Make a copy of this file, and put in in the directory called bbpress that you created above, so you end up with
wp-content/themes/%your-theme-name%/bbpress/loop-single-topic.phpbbPress will now use this template instead of the original and you can amend this.
Now go to line 68, which says
<span class="bbp-topic-started-in"><?php printf( __( 'in: <a href="%1$s">%2$s</a>', 'bbpress' ), bbp_get_forum_permalink( bbp_get_topic_forum_id() ), bbp_get_forum_title( bbp_get_topic_forum_id() ) ); ?></span>
and delete this and save the file
Thanks for your help, Robin W. It worked. I just delete the code of lines 60 and 68 and saved the file.
great – glad you are fixed !