Remove `GetDataDir(bool fNetSpecific = true)` function

src/util/system.cpp

@@ -802,11 +802,6 @@ fs::path GetDefaultDataDir()
 #endif
 }
 
-const fs::path &GetDataDir(bool fNetSpecific)
-{
-    return fNetSpecific ? gArgs.GetDataDirNet() : gArgs.GetDataDirBase();
-}
-
 bool CheckDataDirOption()
 {
     std::string datadir = gArgs.GetArg("-datadir", "");

src/util/system.h

@@ -90,7 +90,6 @@ void ReleaseDirectoryLocks();
 
 bool TryCreateDirectories(const fs::path& p);
 fs::path GetDefaultDataDir();
-const fs::path &GetDataDir(bool fNetSpecific = true);
 // Return true if -datadir option points to a valid directory or is not specified.
 bool CheckDataDirOption();
 fs::path GetConfigFile(const std::string& confPath);