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, 2 insertions, 2 deletions

diff --git a/src/signet.h b/src/signet.h
index 23563a83c4..f876488c0a 100644
--- a/src/signet.h
+++ b/src/signet.h
@@ -9,7 +9,7 @@
 #include <primitives/block.h>
 #include <primitives/transaction.h>
 
-#include <optional.h>
+#include <optional>
 
 /**
  * Extract signature and check whether a block has a valid solution
@@ -28,7 +28,7 @@ class SignetTxs {
     SignetTxs(const T1& to_spend, const T2& to_sign) : m_to_spend{to_spend}, m_to_sign{to_sign} { }
 
 public:
-    static Optional<SignetTxs> Create(const CBlock& block, const CScript& challenge);
+    static std::optional<SignetTxs> Create(const CBlock& block, const CScript& challenge);
 
     const CTransaction m_to_spend;
     const CTransaction m_to_sign;