removed unused Settings::dumpFile (danmar#7097)

Author: firewave

lib/cppcheck.cpp

@@ -332,9 +332,6 @@ static std::vector<std::string> split(const std::string &str, const std::string
 
 static std::string getDumpFileName(const Settings& settings, const std::string& filename)
 {
-    if (!settings.dumpFile.empty())
-        return settings.dumpFile;
-
     std::string extension;
     if (settings.dump || !settings.buildDir.empty())
         extension = ".dump";

lib/settings.h

@@ -207,7 +207,6 @@ class CPPCHECKLIB WARN_UNUSED Settings {
 
     /** @brief Is --dump given? */
     bool dump{};
-    std::string dumpFile;
 
     /** @brief Name of the language that is enforced. Empty per default. */
     Standards::Language enforcedLang{};