The title is self-explanatory, simply add a removeAll function to the CrT integration, Most mods include it by default no matter how unlikely it is to be used, so it's kind of awkward when it isn't there for some reason.

The main reason why, though, is how the scripts look when removing everything manually, as it's ugly and takes a substantial amount of time to write vs. just writing: mods.immersivenegineering.ArcFurnace.removeAll();
An example of how awful the script is:
//Priority (Fixes some issues with replacing alloy recipes like Invar)
#priority 1
//Import
import crafttweaker.item.IItemStack; //Array (No particular order, too many items to do that) val IArray = [<minecraft:gold_ingot>, <techreborn:ingot:1>, <minecraft:iron_ingot>, <thermalfoundation:material:129>, <immersiveengineering:metal:1>, <immersiveengineering:metal:6>, <immersiveengineering:metal>, <immersiveengineering:metal:7>, <immersiveengineering:metal:2>, <immersiveengineering:metal:4>, <immersiveengineering:metal:3>, <immersiveengineering:metal:8>, <immersiveengineering:metal:5>, <mekanism:ingot:1>, <mekanism:ingot>, <thermalfoundation:material:163>, <thermalfoundation:material:161>, <thermalfoundation:material:167>, <thermalfoundation:material:162>, <thermalfoundation:material:135>, <thermalfoundation:material:166>, <thermalfoundation:material:136>, <thermalfoundation:material:134>, <thermalfoundation:material:164>, <thermalfoundation:material:165>, <thermalfoundation:material:160>, <techreborn:ingot:3>, <techreborn:ingot:14>, <techreborn:ingot:15>, <techreborn:ingot:18>, <nuclearcraft:ingot_oxide:3>, <nuclearcraft:ingot_oxide:2>, <nuclearcraft:ingot_oxide>, <nuclearcraft:ingot_oxide:1>, <draconicevolution:draconium_ingot>, <bigreactors:ingotyellorium>, <bigreactors:ingotcyanite>, <bigreactors:ingotblutonium>, <bigreactors:ingotludicrite>, <nuclearcraft:ingot:9>, <nuclearcraft:ingot:5>, <nuclearcraft:ingot:8>, <nuclearcraft:ingot:6>, <nuclearcraft:ingot:7>, <nuclearcraft:ingot:11>, <nuclearcraft:ingot:3>, <nuclearcraft:ingot:10>, <astralsorcery:itemcraftingcomponent:1>, <defiledlands:umbrium_ingot>, <enderio:item_alloy_ingot:7>, <immersiveengineering:material:19>, <libvulpes:productingot:3>, <advancedrocketry:productingot:1>, <advancedrocketry:productingot>, <redstonearsenal:material:32>] as IItemStack[];

for i, item in IArray { mods.immersiveengineering.ArcFurnace.removeRecipe(item);}

Sorry if an issue like this has been opened before, as I did a brief check and didn't find anything.

Sure. I'll look into it for when I next work on it.