Villagers are infuriating when they sell a tool or item that the tweaker tried to make unobtainable, Especially trades added in by mods that sell redundant items that had their oredict and recipes removed.

LootTweaker deals exclusively with loot tables. Villager trades do not use loot tables, hence this is out of scope for LootTweaker and will not be added.
A quick CurseForge search turned up Villager Trade Tables, which looks like it should suit your needs.