Remove OpenSSL PRNG reseeding

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

src/wallet/wallet.cpp

@@ -814,13 +814,11 @@ bool CWallet::EncryptWallet(const SecureString& strWalletPassphrase)
         return false;
 
     CKeyingMaterial vMasterKey;
-    RandAddSeedPerfmon();
 
     vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
     GetRandBytes(&vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
 
     CMasterKey kMasterKey;
-    RandAddSeedPerfmon();
 
     kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
     GetRandBytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);