scripted-diff: remove Optional & nullopt

-BEGIN VERIFY SCRIPT-
git rm src/optional.h

sed -i -e 's/Optional</std::optional</g' $(git grep -l 'Optional<' src)

sed -i -e 's/{nullopt}/{std::nullopt}/g' $(git grep -l 'nullopt' src)
sed -i -e 's/ nullopt;/ std::nullopt;/g' $(git grep -l 'nullopt' src)
sed -i -e 's/ nullopt)/ std::nullopt)/g' $(git grep -l 'nullopt' src)
sed -i -e 's/(nullopt)/(std::nullopt)/g' $(git grep -l 'nullopt' src)
sed -i -e 's/ nullopt,/ std::nullopt,/g' $(git grep -l 'nullopt' src)
sed -i -e 's/? nullopt :/? std::nullopt :/g' $(git grep -l 'nullopt' src)
sed -i -e 's/: nullopt}/: std::nullopt}/g' $(git grep -l 'nullopt' src)

sed -i -e '/optional.h \\/d' src/Makefile.am

sed -i -e '/#include <optional.h>/d' src/test/fuzz/autofile.cpp src/test/fuzz/buffered_file.cpp src/test/fuzz/node_eviction.cpp

sed -i -e 's/#include <optional.h>/#include <optional>/g' $(git grep -l '#include <optional.h>' src)
-END VERIFY SCRIPT-

1 files changed, 4 insertions, 4 deletions

diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index f10b4ad740..5691a5faf5 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -8,7 +8,7 @@
 #include <consensus/consensus.h>
 #include <consensus/tx_verify.h>
 #include <consensus/validation.h>
-#include <optional.h>
+#include <optional>
 #include <policy/fees.h>
 #include <policy/policy.h>
 #include <policy/settings.h>
@@ -159,7 +159,7 @@ bool CTxMemPool::CalculateMemPoolAncestors(const CTxMemPoolEntry &entry, setEntr
         // GetMemPoolParents() is only valid for entries in the mempool, so we
         // iterate mapTx to find parents.
         for (unsigned int i = 0; i < tx.vin.size(); i++) {
-            Optional<txiter> piter = GetIter(tx.vin[i].prevout.hash);
+            std::optional<txiter> piter = GetIter(tx.vin[i].prevout.hash);
             if (piter) {
                 staged_ancestors.insert(**piter);
                 if (staged_ancestors.size() + 1 > limitAncestorCount) {
@@ -890,11 +890,11 @@ const CTransaction* CTxMemPool::GetConflictTx(const COutPoint& prevout) const
     return it == mapNextTx.end() ? nullptr : it->second;
 }
 
-Optional<CTxMemPool::txiter> CTxMemPool::GetIter(const uint256& txid) const
+std::optional<CTxMemPool::txiter> CTxMemPool::GetIter(const uint256& txid) const
 {
     auto it = mapTx.find(txid);
     if (it != mapTx.end()) return it;
-    return Optional<txiter>{};
+    return std::optional<txiter>{};
 }
 
 CTxMemPool::setEntries CTxMemPool::GetIterSet(const std::set<uint256>& hashes) const