Fixed Structure Crash

- Don't carash anymore when you disable structures in the server.properties.

adapters/modded-common/src/main/java/art/arcane/iris/modded/IrisModdedChunkGenerator.java

@@ -195,8 +195,6 @@ public final class IrisModdedChunkGenerator implements NativeGeneratorOwner, Nat
         if (!nativeGenerator.represents(level)) {
             throw new IllegalArgumentException("NativeWorld does not use Iris generator '" + dimensionKey + "'");
         }
-        requireGlobalStructureGeneration(
-                NativeModdedServer.forWorld(level).generateStructures(), dimensionKey);
         Engine activeEngine = engineIfBound();
         Engine replacement = ModdedWorldEngines.prepareReplacement(
                 level,
@@ -462,13 +460,6 @@ public final class IrisModdedChunkGenerator implements NativeGeneratorOwner, Nat
         // A recorded failure stands until repoint or unbind resets the binding; re-running the bind would repeat the
         // history verification on every chunk call and fail the same way.
         engineBinding.throwIfFailed(dimensionKey);
-        try {
-            requireGlobalStructureGeneration(
-                    NativeModdedServer.forWorld(level).generateStructures(), dimensionKey);
-        } catch (RuntimeException error) {
-            recordBindFailure(level, error);
-            throw error;
-        }
         // Cache the owning level so hot paths never scan the level map to find themselves.
         boundLevel = level;
         Engine cached = engine;
@@ -575,29 +566,6 @@ public final class IrisModdedChunkGenerator implements NativeGeneratorOwner, Nat
         }
     }
 
-    static void requireGlobalStructureGeneration(boolean enabled, String dimensionKey) {
-        if (enabled) {
-            return;
-        }
-        String remedy = integratedEnvironment()
-                ? "enable 'Generate Structures' for this world; Iris requires it, then deny families through "
-                        + "importedStructures.disabled or complete keys through importedStructures.disabledExact"
-                : "set generate-structures=true in server.properties, restart the server, "
-                        + "then deny families through importedStructures.disabled or complete keys through "
-                        + "importedStructures.disabledExact";
-        throw new IllegalStateException("Iris generator '" + dimensionKey
-                + "' cannot bind while generate-structures=false; " + remedy);
-    }
-
-    private static boolean integratedEnvironment() {
-        try {
-            return ModdedEngineBootstrap.loader().clientEnvironment();
-        } catch (Throwable e) {
-            // No loader bound (unit tests, very early boot): assume dedicated wording.
-            return false;
-        }
-    }
-
     /**
      * Null only while no level uses this generator (world creation screens, codec validation). A bound level whose
      * engine is refused, unloading or stopping throws, so no stage can mistake it for an unbound generator.

adapters/modded-common/src/main/java/art/arcane/iris/modded/ModdedNativeStructurePolicy.java

@@ -122,17 +122,6 @@ final class ModdedNativeStructurePolicy implements NativeModdedStructureStage.Po
         return ((IrisMaterialPalette) source).get(rng, x, y, z, generator.engine().getData());
     }
 
-    @Override
-    public RuntimeException structuresDisabled(int chunkX, int chunkZ) {
-        return new IllegalStateException("Iris cannot generate native structures in chunk "
-                + chunkX + "," + chunkZ
-                + " because generate-structures=false disables them outside the pack. That flag is fixed when "
-                + "the world is created (server.properties generate-structures, or the Generate Structures "
-                + "toggle in singleplayer), so it cannot be changed for this world: create a new world with "
-                + "structures enabled, then deny families through importedStructures.disabled or complete keys "
-                + "through importedStructures.disabledExact");
-    }
-
     @Override
     public String generationLabel(String structureId) {
         return "Iris native structure " + structureId;