In the new Power CMS Builder, the toolbars are defined in the Power CMS Database.
there are a few tables involved.
pcms2_toolbaroptions - defines all of the items that can belong to a toolbar group
pcms2_toolbarpresets - creates the preset names (Full, default, admin default, etc...) These are the presets that you can set for a content are in the Power CMS Admin section.
pcms2_toolbargroups - sets the diferant toolbar groups (Document, clipboard,etc...)
pcms2_toolbargroupdefinitions - defines which toolbar items belong to a group
pcms2_toolbardefinitions - defines the toolbar groups that belong to a preset.
in the pcms2_toolbaroptions table, the font toolbar item is ToolbarOptionID 61
to remove the font list from the toolbar, you would need to edit the:
pcms2_toolbargroupdefinitions
table and remove the records where GroupDefinitionOption is 61
DELETE FROM pcms2_toolbargroupdefinitions WHERE GroupDefinitionOption = 61