http2: add constant to already destructured constants

PR-URL: #28176
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

lib/internal/http2/compat.js

@@ -4,9 +4,8 @@ const { Object, ObjectPrototype, Reflect } = primordials;
 
 const assert = require('internal/assert');
 const Stream = require('stream');
-const Readable = Stream.Readable;
-const binding = internalBinding('http2');
-const constants = binding.constants;
+const { Readable } = Stream;
+const { constants } = internalBinding('http2');
 const {
   codes: {
     ERR_HTTP2_HEADERS_SENT,
@@ -38,6 +37,7 @@ const kAborted = Symbol('aborted');
 
 const {
   HTTP2_HEADER_AUTHORITY,
+  HTTP2_HEADER_CONNECTION,
   HTTP2_HEADER_METHOD,
   HTTP2_HEADER_PATH,
   HTTP2_HEADER_SCHEME,
@@ -95,7 +95,7 @@ function statusMessageWarn() {
 }
 
 function isConnectionHeaderAllowed(name, value) {
-  return name !== constants.HTTP2_HEADER_CONNECTION ||
+  return name !== HTTP2_HEADER_CONNECTION ||
          value === 'trailers';
 }