Remove return statement in ParticleStorage (broke auto update)

src/main/java/com/alttd/storage/ParticleStorage.java

@@ -20,7 +20,6 @@ public class ParticleStorage {
         if (existingParticleSet.isPresent()) {
             Logger.warning("Overwriting particle set %", particleSet.getParticleId());
             particleSets.remove(existingParticleSet.get());
-            return;
         }
         particleSets.add(particleSet);
         particles.put(aPartType, particleSets);