Fix initializer list initialization for GCC-15 (#5443)

include/xrpl/beast/hash/uhash.h

@@ -30,7 +30,7 @@ namespace beast {
 template <class Hasher = xxhasher>
 struct uhash
 {
-    explicit uhash() = default;
+    uhash() = default;
 
     using result_type = typename Hasher::result_type;
 

include/xrpl/beast/net/IPEndpoint.h

@@ -215,7 +215,7 @@ namespace std {
 template <>
 struct hash<::beast::IP::Endpoint>
 {
-    explicit hash() = default;
+    hash() = default;
 
     std::size_t
     operator()(::beast::IP::Endpoint const& endpoint) const
@@ -230,7 +230,7 @@ namespace boost {
 template <>
 struct hash<::beast::IP::Endpoint>
 {
-    explicit hash() = default;
+    hash() = default;
 
     std::size_t
     operator()(::beast::IP::Endpoint const& endpoint) const

include/xrpl/protocol/AccountID.h

@@ -149,7 +149,7 @@ namespace std {
 template <>
 struct hash<ripple::AccountID> : ripple::AccountID::hasher
 {
-    explicit hash() = default;
+    hash() = default;
 };
 
 }  // namespace std

include/xrpl/protocol/Book.h

@@ -104,7 +104,7 @@ private:
         boost::base_from_member<std::hash<ripple::AccountID>, 1>;
 
 public:
-    explicit hash() = default;
+    hash() = default;
 
     using value_type = std::size_t;
     using argument_type = ripple::Issue;
@@ -131,7 +131,7 @@ private:
     hasher m_hasher;
 
 public:
-    explicit hash() = default;
+    hash() = default;
 
     using value_type = std::size_t;
     using argument_type = ripple::Book;
@@ -154,7 +154,7 @@ namespace boost {
 template <>
 struct hash<ripple::Issue> : std::hash<ripple::Issue>
 {
-    explicit hash() = default;
+    hash() = default;
 
     using Base = std::hash<ripple::Issue>;
     // VFALCO NOTE broken in vs2012
@@ -164,7 +164,7 @@ struct hash<ripple::Issue> : std::hash<ripple::Issue>
 template <>
 struct hash<ripple::Book> : std::hash<ripple::Book>
 {
-    explicit hash() = default;
+    hash() = default;
 
     using Base = std::hash<ripple::Book>;
     // VFALCO NOTE broken in vs2012

include/xrpl/protocol/UintTypes.h

@@ -136,25 +136,25 @@ namespace std {
 template <>
 struct hash<ripple::Currency> : ripple::Currency::hasher
 {
-    explicit hash() = default;
+    hash() = default;
 };
 
 template <>
 struct hash<ripple::NodeID> : ripple::NodeID::hasher
 {
-    explicit hash() = default;
+    hash() = default;
 };
 
 template <>
 struct hash<ripple::Directory> : ripple::Directory::hasher
 {
-    explicit hash() = default;
+    hash() = default;
 };
 
 template <>
 struct hash<ripple::uint256> : ripple::uint256::hasher
 {
-    explicit hash() = default;
+    hash() = default;
 };
 
 }  // namespace std

include/xrpl/resource/detail/Key.h

@@ -53,7 +53,7 @@ struct Key
 
     struct key_equal
     {
-        explicit key_equal() = default;
+        key_equal() = default;
 
         bool
         operator()(Key const& lhs, Key const& rhs) const

src/xrpld/app/paths/RippleLineCache.h

@@ -104,7 +104,7 @@ private:
 
         struct Hash
         {
-            explicit Hash() = default;
+            Hash() = default;
 
             std::size_t
             operator()(AccountKey const& key) const noexcept