0.1.1: drop NeoForge.EVENT_BUS.register(this) with no @SubscribeEvent methods

The empty-class registration was rejected by NeoForge 21.1 at mod-loading
time with:
  IllegalArgumentException: class uk.sijbers.bnstoolkit.BnsToolkit
  has no @SubscribeEvent methods, but register was called anyway.

That tanked the dedicated server during construct-mods. Caught only after
deploying 0.1.0 to the live server — the local /gradlew build doesn't
exercise mod-loading. Will add a gameTestServer run later to catch this
class of bug pre-deploy.

When the first @SubscribeEvent listener lands (likely PlayerLoggedInEvent
in M1), the register call comes back together with it.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

gradle.properties

@@ -19,5 +19,5 @@ loader_version_range=[1,)
 mod_id=bnstoolkit
 mod_name=Brass and Sigil Toolkit
 mod_license=All Rights Reserved
-mod_version=0.1.0
+mod_version=0.1.1
 mod_group_id=uk.sijbers.bnstoolkit

src/main/java/uk/sijbers/bnstoolkit/BnsToolkit.java

@@ -3,7 +3,6 @@ package uk.sijbers.bnstoolkit;
 import net.neoforged.bus.api.IEventBus;
 import net.neoforged.fml.common.Mod;
 import net.neoforged.fml.event.lifecycle.FMLCommonSetupEvent;
-import net.neoforged.neoforge.common.NeoForge;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import uk.sijbers.bnstoolkit.network.BnsNetwork;
@@ -30,7 +29,11 @@ public final class BnsToolkit {
         BnsNetwork.register(modBus);
 
         modBus.addListener(this::onCommonSetup);
-        NeoForge.EVENT_BUS.register(this);
+
+        // NOTE: do NOT call NeoForge.EVENT_BUS.register(this) here — NeoForge
+        // 21.1+ throws if the registered class has zero @SubscribeEvent methods.
+        // Add the register() call back together with the first @SubscribeEvent
+        // method (likely PlayerEvent.PlayerLoggedInEvent in M1).
     }
 
     private void onCommonSetup(final FMLCommonSetupEvent event) {