Ditch migrations that are no longer needed

Anything 1.16 is not a problem
Mid 1.18 stuff depends on when they are updating from, I think its safe to assume they installed the latest 1.18 build assuming that will work

src/main/java/slimeknights/tconstruct/TConstruct.java

@@ -1,14 +1,9 @@
 package slimeknights.tconstruct;
 
-import net.minecraft.core.Registry;
 import net.minecraft.data.DataGenerator;
 import net.minecraft.network.chat.Component;
 import net.minecraft.network.chat.MutableComponent;
 import net.minecraft.resources.ResourceLocation;
-import net.minecraft.world.item.Items;
-import net.minecraft.world.level.ItemLike;
-import net.minecraft.world.level.block.Block;
-import net.minecraft.world.level.block.Blocks;
 import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.common.data.ExistingFileHelper;
@@ -20,10 +15,8 @@
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.event.lifecycle.FMLCommonSetupEvent;
 import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
-import net.minecraftforge.registries.MissingMappingsEvent;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-import slimeknights.mantle.registration.RegistrationHelper;
 import slimeknights.tconstruct.common.TinkerModule;
 import slimeknights.tconstruct.common.TinkerTags;
 import slimeknights.tconstruct.common.config.Config;
@@ -61,7 +54,6 @@
 import slimeknights.tconstruct.world.TinkerStructures;
 import slimeknights.tconstruct.world.TinkerWorld;
 
-import javax.annotation.Nullable;
 import java.util.Locale;
 import java.util.Random;
 import java.util.function.Supplier;
@@ -160,50 +152,6 @@ static void gatherData(final GatherDataEvent event) {
     */
   }
 
-  @Nullable
-  private static Block missingBlock(String name) {
-    return switch (name) {
-      case "copper_block" -> Blocks.COPPER_BLOCK;
-      case "copper_ore" -> Blocks.COPPER_ORE;
-      // tinker bronze -> amethyst bronze
-      case "tinkers_bronze_block" -> TinkerMaterials.amethystBronze.get();
-      case "molten_tinkers_bronze_fluid" -> TinkerFluids.moltenAmethystBronze.getBlock();
-      default -> null;
-    };
-  }
-
-  @SubscribeEvent
-  void missingMappings(MissingMappingsEvent event) {
-    // TODO: remove these as not needed anymore
-    // items
-    RegistrationHelper.handleMissingMappings(event, MOD_ID, Registry.ITEM_REGISTRY, name -> {
-      switch(name) {
-        case "copper_ingot": return Items.COPPER_INGOT;
-        case "blank_cast": return Items.GOLD_INGOT;
-        case "pickaxe_head": return TinkerToolParts.pickHead.get();
-        case "pickaxe_head_cast": return TinkerSmeltery.pickHeadCast.get();
-        case "pickaxe_head_sand_cast": return TinkerSmeltery.pickHeadCast.getSand();
-        case "pickaxe_head_red_sand_cast": return TinkerSmeltery.pickHeadCast.getRedSand();
-        // tinker bronze -> amethyst bronze
-        case "tinkers_bronze_ingot": TinkerMaterials.amethystBronze.getIngot();
-        case "tinkers_bronze_nugget": TinkerMaterials.amethystBronze.getNugget();
-        case "molten_tinkers_bronze_bucket": return TinkerFluids.moltenAmethystBronze.asItem();
-        case "flint_and_bronze": TinkerTools.flintAndBrick.get();
-      }
-      ItemLike block = missingBlock(name);
-      return block == null ? null : block.asItem();
-    });
-    // blocks
-    RegistrationHelper.handleMissingMappings(event, MOD_ID, Registry.BLOCK_REGISTRY, TConstruct::missingBlock);
-    // fluids
-    RegistrationHelper.handleMissingMappings(event, MOD_ID, Registry.FLUID_REGISTRY, name -> switch (name) {
-      // tinker bronze -> amethyst bronze
-      case "molten_tinkers_bronze" -> TinkerFluids.moltenAmethystBronze.get();
-      case "flowing_molten_tinkers_bronze" -> TinkerFluids.moltenAmethystBronze.getFlowing();
-      default -> null;
-    });
-  }
-
 
   /* Utils */
 

src/main/java/slimeknights/tconstruct/tools/data/ModifierProvider.java

@@ -128,23 +128,6 @@ protected void addModifiers() {
     buildModifier(ModifierIds.rebalanced)
       .tooltipDisplay(TooltipDisplay.TINKER_STATION).levelDisplay(ModifierLevelDisplay.NO_LEVELS)
       .addModule(new SwappableSlotModule(1)).addModule(new SwappableSlotModule.BonusSlot(SlotType.ABILITY, SlotType.UPGRADE, -1));
-    addRedirect(id("red_extra_upgrade"),   redirect(ModifierIds.writable));
-    addRedirect(id("green_extra_upgrade"), redirect(ModifierIds.recapitated));
-    addRedirect(id("blue_extra_upgrade"),  redirect(ModifierIds.harmonious));
-    addRedirect(id("extra_ability"),       redirect(ModifierIds.draconic));
-
-    // internal modifier migration
-    addRedirect(id("shovel_flatten"), redirect(ModifierIds.pathing));
-    addRedirect(id("axe_strip"), redirect(ModifierIds.stripping));
-    addRedirect(id("hoe_till"), redirect(ModifierIds.tilling));
-    addRedirect(id("firestarter_hidden"), redirect(TinkerModifiers.firestarter.getId()));
-
-    // merged some armor modifiers
-    addRedirect(id("haste_armor"), redirect(TinkerModifiers.haste.getId()));
-    addRedirect(id("knockback_armor"), redirect(TinkerModifiers.knockback.getId()));
-
-    // unarmed rework
-    addRedirect(id("unarmed"), redirect(TinkerModifiers.ambidextrous.getId()));
 
     // tier upgrades
     // emerald
@@ -294,7 +277,6 @@ protected void addModifiers() {
     buildModifier(ModifierIds.killager).addModule(IncrementalModule.RECIPE_CONTROLLED).addModule(ConditionalMeleeDamageModule.builder().target(LivingEntityPredicate.OR.create(
       new MobTypePredicate(MobType.ILLAGER),
       new TagEntityPredicate(TinkerTags.EntityTypes.VILLAGERS))).eachLevel(2.0f));
-    addRedirect(id("fractured"), redirect(ModifierIds.sharpness));
     buildModifier(ModifierIds.pierce)
       // less than sharpness, but pierces 1 armor
       .addModule(StatBoostModule.add(ToolStats.ATTACK_DAMAGE).eachLevel(0.5f))
@@ -336,11 +318,9 @@ protected void addModifiers() {
     buildModifier(ModifierIds.strength)
       .addModule(IncrementalModule.RECIPE_CONTROLLED)
       .addModule(AttributeModule.builder(Attributes.ATTACK_DAMAGE, Operation.MULTIPLY_TOTAL).uniqueFrom(ModifierIds.strength).slots(armorSlots).eachLevel(0.1f));
-    addRedirect(id("armor_power"), redirect(ModifierIds.strength));
     // leggings
     addModifier(ModifierIds.pockets, new InventoryMenuModifier(18));
     addModifier(ModifierIds.toolBelt, new ToolBeltModifier(new int[] {4, 5, 6, 7, 8, 9}));
-    addRedirect(id("pocket_chain"), redirect(TinkerModifiers.shieldStrap.getId()));
     buildModifier(ModifierIds.stepUp).addModule(AttributeModule.builder(ForgeMod.STEP_HEIGHT_ADDITION.get(), Operation.ADDITION).uniqueFrom(ModifierIds.stepUp).slots(armorSlots).eachLevel(0.5f));
     buildModifier(ModifierIds.speedy).addModule(AttributeModule.builder(Attributes.MOVEMENT_SPEED, Operation.MULTIPLY_TOTAL).uniqueFrom(ModifierIds.speedy).slots(armorMainHand).eachLevel(0.1f));
     // boots
@@ -369,8 +349,6 @@ protected void addModifiers() {
     buildModifier(ModifierIds.tilling)
       .addModule(ShowOffhandModule.DISALLOW_BROKEN)
       .addModule(ToolActionTransformModule.builder(ToolActions.HOE_TILL, SoundEvents.HOE_TILL).build());
-    addRedirect(id("axe_scrape"), redirect(ModifierIds.stripping));
-    addRedirect(id("axe_wax_off"), redirect(ModifierIds.stripping));
 
     // internal
     buildModifier(ModifierIds.overslimeFriend).addModule(new VolatileFlagModule(OverslimeModifier.KEY_OVERSLIME_FRIEND)).tooltipDisplay(TooltipDisplay.NEVER);
@@ -454,7 +432,6 @@ protected void addModifiers() {
     // traits - tier 3
     buildModifier(ModifierIds.crumbling).addModule(ConditionalMiningSpeedModule.builder().blocks(BlockPredicate.REQUIRES_TOOL.inverted()).allowIneffective().eachLevel(0.5f));
     buildModifier(ModifierIds.enhanced).priority(60).addModule(UPGRADE);
-    addRedirect(id("maintained_2"), redirect(ModifierIds.maintained));
     // traits - tier 3 nether
     buildModifier(ModifierIds.lightweight)
       .addModule(StatBoostModule.multiplyBase(ToolStats.ATTACK_SPEED).eachLevel(0.07f))

src/main/java/slimeknights/tconstruct/tools/data/material/MaterialDataProvider.java

@@ -1,9 +1,7 @@
 package slimeknights.tconstruct.tools.data.material;
 
 import net.minecraft.data.DataGenerator;
-import slimeknights.tconstruct.TConstruct;
 import slimeknights.tconstruct.library.data.material.AbstractMaterialDataProvider;
-import slimeknights.tconstruct.library.materials.definition.MaterialId;
 
 public class MaterialDataProvider extends AbstractMaterialDataProvider {
   public MaterialDataProvider(DataGenerator gen) {
@@ -112,13 +110,5 @@ protected void addMaterials() {
     //addMaterial(MaterialIds.venom,      3, ORDER_REPAIR, true);
     // slimesuit - repair
     addMaterial(MaterialIds.phantom,    1, ORDER_REPAIR, true);
-
-    // legacy
-    addRedirect(new MaterialId(TConstruct.MOD_ID, "stone"),     redirect(MaterialIds.rock));
-    addRedirect(new MaterialId(TConstruct.MOD_ID, "gunpowder"), redirect(MaterialIds.glass));
-    addRedirect(new MaterialId(TConstruct.MOD_ID, "spider"),    redirect(MaterialIds.string));
-    addRedirect(new MaterialId(TConstruct.MOD_ID, "venom"),     redirect(MaterialIds.darkthread));
-    addRedirect(new MaterialId(TConstruct.MOD_ID, "rabbit"),    redirect(MaterialIds.leather));
-    addRedirect(new MaterialId(TConstruct.MOD_ID, "tinkers_bronze"), conditionalRedirect(MaterialIds.bronze, tagExistsCondition("ingots/bronze")), redirect(MaterialIds.copper));
   }
 }