items/light.png never appears in-game, is pointlessly referenced by other game assets

The bug

21w42a changes light blocks such that they now use the corresponding item texture for particle rendering. As such, the formerly used light texture rendered as a particle for all light levels is now unused. It was also previously used for light items with invalid state tags, however even this seems to no longer be the case (see also MC-235665).

As of 24w36a the texture can be forced to appear if giving oneself an item with an item model component pointing to "light".

How to fix

Remove this texture, and repoint the main texture used in the light.json item model to the level-15 texture.