Crypto: remove ed25519 assertions

The verifier assertion won't allow the verifier to simply return, from
which we then throw accordingly. The signer assertion should be removed
because we throw on bad signing anyway.

src/core/crypto/impl/cryptopp/signature.cc

@@ -45,7 +45,6 @@
 
 #include <algorithm>
 #include <array>
-#include <cassert>
 #include <cstdint>
 #include <cstring>
 #include <memory>
@@ -844,8 +843,6 @@ class Ed25519Verifier::Ed25519VerifierImpl
     int const ret(CryptoPP::NaCl::crypto_sign_open(
         rm, &rmlen, sm.data(), sm.size(), m_Pk.data()));
 
-    assert(rmlen == mlen);
-
     return !ret;
   }
 
@@ -905,7 +902,6 @@ class Ed25519Signer::Ed25519SignerImpl
           CryptoPP::Exception::OTHER_ERROR, "could not ed25519 sign message");
 
     // We only want the signature
-    assert(sm.size() == smlen);
     std::copy(sm.begin(), sm.end() - mlen, signature);
   }