src: remove unused v8::TryCatch namespace

PR-URL: #32729
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Gerhard Stöbich <[email protected]>
Reviewed-By: Zeyu Yang <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

src/async_wrap.cc

@@ -49,7 +49,6 @@ using v8::PropertyAttribute;
 using v8::PropertyCallbackInfo;
 using v8::ReadOnly;
 using v8::String;
-using v8::TryCatch;
 using v8::Uint32;
 using v8::Undefined;
 using v8::Value;