The Clipboard Filter macro group is a default macro group for processing the clipboard. They do not have hot key triggers, they have Clipboard Filter trigger, which means they appear in the Clipboard History Switcher, in the gear menu. In the Clipboard History Switcher, you can select an entry, and then select one of the macros from the gear menu (eg Lowercase) and it will perform its action on the selected entry.
If you don't want them, delete the whole folder. You can always add them back from the Macro Library.