Ice caves generate gravel, diorite, and andesite blobs twice

The Bug:

Ice caves generate gravel, diorite, and andesite blobs twice.

The ice caves biome runs two copies of the gravel, diorite, and andesite blob generators. We have the normal ones and ice cave copies that do the same job. This means that stone in ice caves gets twice as many of these blobs as in any other biome. The ores on the other hand, are correctly listed once as ice cave versions only.

Steps to Reproduce:

1. Open the 26.4 Snapshot 4 jar file and locate the data/minecraft/worldgen/biome/ice_caves.json file.

2. Observe if ore_gravel, ore_diorite_upper, ore_diorite_lower, ore_andesite_upper and ore_andesite_lower are listed alongside their ice_cave_ore_ copies.

Observed Behavior:

ice_caves.json lists both ore_gravel and ice_cave_ore_gravel, and the same for diorite and andesite.

Expected Behavior:

Each blob would be generated once, as the ores are.