I have tried to use the crafttweaker functionality recipes.removeShaped(, input[][]) on UUMatter recipes. But crafttweaker fails to remove those recipes.
See CraftTweaker/CraftTweaker#476
I'm guessing Tech Reborn registers this recipe in a different way or later, so that crafttweaker doesn't find it, or simply cannot remove it.

Guinaro

They are registered in the same way as all off our other crafting recipes. https://github.com/TechReborn/TechReborn/blob/1.12/src/main/java/techreborn/init/recipes/CraftingTableRecipes.java#L244

Short update.
I found a way to remove them based on name.
recipes.removeByRecipeName("techreborn:...);
Still it seems stranges that when providing the exact output as given by /ct recipes it doesn't work.
So currently low priority if fixable. Workaround gives intended result: removal of 1 recipe, still wondering why shaped doesn't work.

That commit there should fix it.

Explanation:
The Ingredient.fromItem method creates a stack with the ore dict wildcard meta, so crafttweaker wont be detecting it. This should fix it.