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1. Did Minecraft ever have a biome known as Hell?
Prior to 1.13, the Nether's only biome was called Hell.
2. Did Minecraft ever have the ability to craft in-world rather than in the crafting table UI?
In the joke snapshot 22w13oneBlockAtATime, crafting had to be done in-world.
3. Did Minecraft ever have a racing minigame using the elytra?
The Legacy Console versions of the game contained three minigames, one of which was Glide, where players would race each other with elytra.
4. Did Minecraft ever have vertical slabs?
Minecraft has never had vertical slabs, not even in a joke version.
5. Did Minecraft ever have milkable squids?
In Java Edition Beta 1.2, squids were milkable.
6. Did Minecraft ever have fiber optic cables?
Minecraft has never had fiber optic cables. However, it has had a USB Charger Block in the snapshot 1.RV-Pre1.
7. Did Minecraft ever have a Block of Corrupted Potato Peels?
Minecraft had a Block of Corrupted Potato Peels in the snapshot 24w14potato.
8. Did Minecraft ever have more than 3 dimensions?
In various joke snapshots (20w14∞, 23w13a_or_b, 24w14potato), there have been more than 3 dimensions.
9. Did Minecraft ever have non-infinte worlds?
Infinite worlds were added in Infdev.
10. Did Minecraft ever have Game of Life blocks?
It did have Langton's ant though.
11. Did Minecraft ever had torches that would burn out?
Torches would randomly burn out in Minecraft 2.0.
12. Did Minecraft ever have support for 3D glasses?
The 3D anaglyph setting was added in 0.24_SURVIVAL_TEST, and was removed in 17w43a.
13. Did Minecraft ever have ducks?
No ducks, only chickens.
14. Did Minecraft ever have an infinite lava source?
The Lava Spawner was added in Indev 0.31, and was removed shortly after the Seecret Friday 1 update.
15. Did Minecraft ever have a Block of Beef?