src: remove unused using declarations async_wrap

PR-URL: #18893
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Minwoo Jung <[email protected]>
Reviewed-By: Yuta Hiroto <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Gibson Fahnestock <[email protected]>

Author: danbev

src/async_wrap.cc

@@ -27,9 +27,7 @@
 #include "v8.h"
 #include "v8-profiler.h"
 
-using v8::Array;
 using v8::Context;
-using v8::Float64Array;
 using v8::Function;
 using v8::FunctionCallbackInfo;
 using v8::FunctionTemplate;
@@ -47,7 +45,6 @@ using v8::PromiseHookType;
 using v8::PropertyCallbackInfo;
 using v8::RetainedObjectInfo;
 using v8::String;
-using v8::TryCatch;
 using v8::Undefined;
 using v8::Value;