Removing Blocks from Block Tag issues (1.20.2)

I am trying to remove 'minecraft:ancient_debris' from the tag 'needs_diamond_tool' in the vanilla files. I have looked all over the forums and discord, but i cannot find anything exactly like what I am struggling with. I have checked and copied the paths and file name countless times, as well as doing a whole lot of other things, but it does not seem to work.

here is the edited 'needs_diamond_tool.json' file

{
  "replace": false,
  "values": [
    "minecraft:obsidian",
    "minecraft:crying_obsidian",
    "minecraft:netherite_block",
    "minecraft:respawn_anchor"
  ],
  "remove": [
    "minecraft:ancient_debris"
  ]
}

Not only that, but I have also tried messing around with the dependencies in my 'mods.toml' file in order to make vanilla and forge load after my mod, but that does nothing.

I am willing to send any other files if that were to help at all, thankyou!