src: mark empty destructors as default

Mark empty destructors as having a default no-op implementation.
Remove a few unused constructors and destructors while we are here.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/stream_wrap.h b/src/stream_wrap.h
index 3c058d26f8a..dbb969a06c6 100644
--- a/src/stream_wrap.h
+++ b/src/stream_wrap.h
@@ -72,8 +72,7 @@ class StreamWrapCallbacks {
   explicit StreamWrapCallbacks(StreamWrapCallbacks* old) : wrap_(old->wrap()) {
   }
 
-  virtual ~StreamWrapCallbacks() {
-  }
+  virtual ~StreamWrapCallbacks() = default;
 
   virtual const char* Error();