src: remove unused v8 namespace

PR-URL: #32375
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: David Carlier <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: juanarbol

src/node_v8.cc

@@ -28,7 +28,6 @@ namespace node {
 
 using v8::Array;
 using v8::ArrayBuffer;
-using v8::BackingStore;
 using v8::Context;
 using v8::FunctionCallbackInfo;
 using v8::HeapCodeStatistics;