lib: remove unused binding const

This commit removes the binding const as it is only used in one place
which is in the following line.

PR-URL: #20144
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Yuta Hiroto <hello@hiroppy.me>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

Author: danbev

lib/_tls_common.js

@@ -34,8 +34,7 @@ const { SSL_OP_CIPHER_SERVER_PREFERENCE } = process.binding('constants').crypto;
 // Lazily loaded
 var crypto = null;
 
-const binding = process.binding('crypto');
-const NativeSecureContext = binding.SecureContext;
+const { SecureContext: NativeSecureContext } = process.binding('crypto');
 
 function SecureContext(secureProtocol, secureOptions, context) {
   if (!(this instanceof SecureContext)) {