src: remove cast for unsupported openssl

The cast is needed to build against OpenSSL 1.0.2, which master, 11.x,
and 10.x no longer support.

PR-URL: #26305
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

src/node_crypto_bio.cc

@@ -39,9 +39,7 @@ namespace crypto {
 
 
 BIOPointer NodeBIO::New(Environment* env) {
-  // The const_cast doesn't violate const correctness.  OpenSSL's usage of
-  // BIO_METHOD is effectively const but BIO_new() takes a non-const argument.
-  BIOPointer bio(BIO_new(const_cast<BIO_METHOD*>(GetMethod())));
+  BIOPointer bio(BIO_new(GetMethod()));
   if (bio && env != nullptr)
     NodeBIO::FromBIO(bio.get())->env_ = env;
   return bio;