there is no customization for these
You need to use this
First possibility is to create own FPM-configurations (by copying the SAP configurations) in the customer name space and register/specify them in the above mentioned customizing activity. In your own FPM-configurations you can simply remove the icons. Disadvantage is that this might be a lot of work if you use a huge * of infotypes.
Second possibility is to manipulate the SAP configurations by means of "Customizing". You open the FPM-configuration in the editor and use function "Additional Functions -> Create customizing". Now you can remove the icons. Like above, this might infect a huge * of infotypes.
Another possibility is to enhance the feeder classes (ABAP-code) that provide the infotype data to be displayed in the FPM-configurations at runtime. The feeder classes have the possibility to * icons to inactive/invisible. As most infotypes use the same feeder classes, the effort would be less but of course requires coding skills.