use normal mutex instead of recursivemutex

RedPandaIDE/parser/cppparser.cpp

@@ -28,12 +28,7 @@
 
 static QAtomicInt cppParserCount(0);
 
-CppParser::CppParser(QObject *parent) : QObject(parent),
-#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
-    mMutex()
-#else
-    mMutex(QMutex::Recursive)
-#endif
+CppParser::CppParser(QObject *parent) : QObject(parent)
 {
     mParserId = cppParserCount.fetchAndAddRelaxed(1);
     mLanguage = ParserLanguage::CPlusPlus;

RedPandaIDE/parser/cppparser.h

@@ -692,11 +692,7 @@ private:
 #ifdef QT_DEBUG
     int mLastIndex;
 #endif
-#if QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)
-    QRecursiveMutex mMutex;
-#else
     QMutex mMutex;
-#endif
     QMap<QString,KeywordType> mCppKeywords;
     QSet<QString> mCppTypeKeywords;
 };