Remove OpenSSL PRNG reseeding

Per https://download.libsodium.org/doc/generating_random_data/ reseeding the
default libsodium PRNG is not required.

src/key.cpp

@@ -21,7 +21,6 @@ bool CKey::Check(const unsigned char *vch) {
 }
 
 void CKey::MakeNewKey(bool fCompressedIn) {
-    RandAddSeedPerfmon();
     do {
         GetRandBytes(vch, sizeof(vch));
     } while (!Check(vch));