chore: Remove explicit accountNotFound message (#2978)

I searched rippled code, and there is no `accountNotFound` anywhere.
So, we should probably stick to the default, it looks reasonable

src/rpc/handlers/AccountChannels.cpp

@@ -107,7 +107,7 @@ AccountChannelsHandler::process(
     );
 
     if (!accountLedgerObject)
-        return Error{Status{RippledError::rpcACT_NOT_FOUND, "accountNotFound"}};
+        return Error{Status{RippledError::rpcACT_NOT_FOUND}};
 
     auto const destAccountID = input.destinationAccount
         ? accountFromStringStrict(input.destinationAccount.value())

src/rpc/handlers/AccountCurrencies.cpp

@@ -65,7 +65,7 @@ AccountCurrenciesHandler::process(
         ripple::keylet::account(*accountID).key, lgrInfo.seq, ctx.yield
     );
     if (!accountLedgerObject)
-        return Error{Status{RippledError::rpcACT_NOT_FOUND, "accountNotFound"}};
+        return Error{Status{RippledError::rpcACT_NOT_FOUND}};
 
     Output response;
     auto const addToResponse = [&](ripple::SLE const sle) {

src/rpc/handlers/AccountLines.cpp

@@ -156,7 +156,7 @@ AccountLinesHandler::process(AccountLinesHandler::Input const& input, Context co
     );
 
     if (not accountLedgerObject)
-        return Error{Status{RippledError::rpcACT_NOT_FOUND, "accountNotFound"}};
+        return Error{Status{RippledError::rpcACT_NOT_FOUND}};
 
     auto const peerAccountID =
         input.peer ? accountFromStringStrict(*(input.peer)) : std::optional<ripple::AccountID>{};

src/rpc/handlers/AccountNFTs.cpp

@@ -68,7 +68,7 @@ AccountNFTsHandler::process(AccountNFTsHandler::Input const& input, Context cons
     );
 
     if (!accountLedgerObject)
-        return Error{Status{RippledError::rpcACT_NOT_FOUND, "accountNotFound"}};
+        return Error{Status{RippledError::rpcACT_NOT_FOUND}};
 
     auto response = Output{};
     response.account = input.account;

src/rpc/handlers/AccountObjects.cpp

@@ -69,7 +69,7 @@ AccountObjectsHandler::process(AccountObjectsHandler::Input const& input, Contex
     );
 
     if (!accountLedgerObject)
-        return Error{Status{RippledError::rpcACT_NOT_FOUND, "accountNotFound"}};
+        return Error{Status{RippledError::rpcACT_NOT_FOUND}};
 
     auto typeFilter = std::optional<std::vector<ripple::LedgerEntryType>>{};
 

src/rpc/handlers/AccountOffers.cpp

@@ -85,7 +85,7 @@ AccountOffersHandler::process(AccountOffersHandler::Input const& input, Context
     );
 
     if (!accountLedgerObject)
-        return Error{Status{RippledError::rpcACT_NOT_FOUND, "accountNotFound"}};
+        return Error{Status{RippledError::rpcACT_NOT_FOUND}};
 
     Output response;
     response.account = ripple::to_string(*accountID);

src/rpc/handlers/GatewayBalances.cpp

@@ -80,7 +80,7 @@ GatewayBalancesHandler::process(
     );
 
     if (!accountLedgerObject)
-        return Error{Status{RippledError::rpcACT_NOT_FOUND, "accountNotFound"}};
+        return Error{Status{RippledError::rpcACT_NOT_FOUND}};
 
     auto output = GatewayBalancesHandler::Output{};
 

src/rpc/handlers/NFTsByIssuer.cpp

@@ -68,7 +68,7 @@ NFTsByIssuerHandler::process(NFTsByIssuerHandler::Input const& input, Context co
     );
 
     if (!accountLedgerObject)
-        return Error{Status{RippledError::rpcACT_NOT_FOUND, "accountNotFound"}};
+        return Error{Status{RippledError::rpcACT_NOT_FOUND}};
 
     std::optional<uint256> cursor;
     if (input.marker)

src/rpc/handlers/NoRippleCheck.cpp

@@ -74,7 +74,7 @@ NoRippleCheckHandler::process(NoRippleCheckHandler::Input const& input, Context
     auto const accountObj = sharedPtrBackend_->fetchLedgerObject(keylet, lgrInfo.seq, ctx.yield);
 
     if (!accountObj)
-        return Error{Status{RippledError::rpcACT_NOT_FOUND, "accountNotFound"}};
+        return Error{Status{RippledError::rpcACT_NOT_FOUND}};
 
     auto it = ripple::SerialIter{accountObj->data(), accountObj->size()};
     auto sle = ripple::SLE{it, keylet};