src: remove unused using declarations in worker.cc

This commit removes unused using declarations in
src/node_worker.cc.

PR-URL: #29883
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

Author: danbev

src/node_worker.cc

@@ -18,10 +18,8 @@
 
 using node::options_parser::kDisallowedInEnvironment;
 using v8::Array;
-using v8::ArrayBuffer;
 using v8::Boolean;
 using v8::Context;
-using v8::Function;
 using v8::FunctionCallbackInfo;
 using v8::FunctionTemplate;
 using v8::HandleScope;