Remove and disallow unused copy constructor

lib/timer.cpp

@@ -82,15 +82,6 @@ Timer::Timer(const std::string& str, unsigned int showtimeMode, TimerResultsIntf
         _start = std::clock();
 }
 
-Timer::Timer(const Timer& other)
-    : _str(other._str)
-    , _timerResults(other._timerResults)
-    , _start(other._start)
-    , _showtimeMode(other._showtimeMode)
-    , _stopped(other._stopped)
-{
-}
-
 Timer::~Timer()
 {
     Stop();

lib/timer.h

@@ -70,11 +70,11 @@ private:
 class CPPCHECKLIB Timer {
 public:
     Timer(const std::string& str, unsigned int showtimeMode, TimerResultsIntf* timerResults = nullptr);
-    Timer(const Timer& other);
     ~Timer();
     void Stop();
 
 private:
+    Timer(const Timer& other); // disallow copying
     Timer& operator=(const Timer&); // disallow assignments
 
     const std::string _str;