Update src/crystal/event_loop/wasi.cr

Co-authored-by: Sijawusz Pur Rahnama <sija@sija.pl>

Author: ysbaddaden

src/crystal/event_loop/wasi.cr

@@ -84,9 +84,6 @@ class Crystal::EventLoop::Wasi < Crystal::EventLoop
     file_descriptor.evented_close
   end
 
-  def shutdown(file_descriptor : Crystal::System::FileDescriptor) : Nil
-  end
-
   def close(file_descriptor : Crystal::System::FileDescriptor) : Nil
     file_descriptor.file_descriptor_close
   end