iwyu: Do not export crypto/hex_base.h header

src/core_io.cpp

@@ -9,6 +9,7 @@
 #include <consensus/amount.h>
 #include <consensus/consensus.h>
 #include <consensus/validation.h>
+#include <crypto/hex_base.h>
 #include <key_io.h>
 #include <primitives/block.h> // IWYU pragma: keep
 #include <primitives/transaction.h>

src/kernel/chainparams.cpp

@@ -9,6 +9,7 @@
 #include <consensus/amount.h>
 #include <consensus/merkle.h>
 #include <consensus/params.h>
+#include <crypto/hex_base.h>
 #include <hash.h>
 #include <kernel/messagestartchars.h>
 #include <logging.h>

src/node/blockstorage.cpp

@@ -7,6 +7,7 @@
 #include <arith_uint256.h>
 #include <chain.h>
 #include <consensus/params.h>
+#include <crypto/hex_base.h>
 #include <dbwrapper.h>
 #include <flatfile.h>
 #include <hash.h>

src/util/strencodings.h

@@ -9,7 +9,7 @@
 #ifndef BITCOIN_UTIL_STRENCODINGS_H
 #define BITCOIN_UTIL_STRENCODINGS_H
 
-#include <crypto/hex_base.h> // IWYU pragma: export
+#include <crypto/hex_base.h>
 #include <span.h>
 #include <util/string.h>