No Glowstone in Basalt Deltas

The basalt delta biome is desolate and beautiful, but the normal glowstone veins seem a little out of place compared to the rest of the biome. I think the biome would look a lot better without them. Additionally this would help the variation between different nether biomes, as glowstone could be a resource that one would have to go to a specific biome, such as the nether wastes, to get.