remove CheckedRegistry#registerUnchecked

common/implementation/src/main/java/com/dfsek/terra/registry/CheckedRegistryImpl.java

@@ -31,12 +31,6 @@ public class CheckedRegistryImpl<T> implements CheckedRegistry<T> {
         registry.registerChecked(identifier, value);
     }
     
-    @Override
-    @Deprecated
-    public void registerUnchecked(String identifier, T value) {
-        registry.register(identifier, value);
-    }
-    
     @Override
     public T get(String identifier) {
         return registry.get(identifier);