❔How can i remove the kit items from being displayed in the menu?

Answer

Do you want to remove the whole kit from being displayed on the menu? Make sure to remove the %kit% placeholder from the menu: select_mode.

An example of an item that has the %kit% placeholder

mode-item:
  display-name: '&aPlay %display_name%'
  lore:
  - '&7%description%'
  - ''
  - ' %kit%'
  - ''
  - '&e%arenas% &aavailable arena(s)!'
  - ''
  - '&6Left-Click: &eSelect mode.'
  - '&6Right-Click: &ePreview kit.'