fix: Remove unused/unreachable transactor code (#6612)

src/libxrpl/tx/SignerEntries.cpp

@@ -12,8 +12,6 @@ namespace xrpl {
 Expected<std::vector<SignerEntries::SignerEntry>, NotTEC>
 SignerEntries::deserialize(STObject const& obj, beast::Journal journal, std::string_view annotation)
 {
-    std::pair<std::vector<SignerEntry>, NotTEC> s;
-
     if (!obj.isFieldPresent(sfSignerEntries))
     {
         JLOG(journal.trace()) << "Malformed " << annotation << ": Need signer entry array.";

src/libxrpl/tx/Transactor.cpp

@@ -677,8 +677,7 @@ Transactor::checkSign(
     }
 
     // Look up the account.
-    auto const idSigner =
-        pkSigner.empty() ? idAccount : calcAccountID(PublicKey(makeSlice(pkSigner)));
+    auto const idSigner = calcAccountID(PublicKey(makeSlice(pkSigner)));
     auto const sleAccount = view.read(keylet::account(idAccount));
     if (!sleAccount)
         return terNO_ACCOUNT;