Remove Iterable from Registry.

This is because this conflicts with Vanilla. If you want to iterate over all entries, use streamEntries instead.

Author: dualspiral

src/main/java/org/spongepowered/api/registry/Registry.java

@@ -37,7 +37,7 @@
  * @param <T> The type
  */
 @DoNotStore
-public interface Registry<T> extends Iterable<RegistryEntry<T>> {
+public interface Registry<T> {
 
     /**
      * Gets the {@link ResourceKey key} identifying this registry.