In the current version this is broken. Normally you could do things like
and it would remove all of the recipes that had that result. No longer is this the case.
If that function is restored you could generate a script based on the /minetweaker names output using a regex in something like netbeans or notepad++ where you take each line and add recipes.removeShaped and recipes.removeShapeless for each name.
(as noted above)
and if some are missing you can tweak it in-game using /minetweaker reload until you see that the recipes disappear.