Remove some dead code

Change-Id: I526d9baee260f018cec6076595a28be8596b6395
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Vitaly Fanaskov <vitaly.fanaskov@qt.io>
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

src/concurrent/qtconcurrentfunctionwrappers.h

@@ -49,23 +49,6 @@ QT_BEGIN_NAMESPACE
 
 namespace QtConcurrent {
 
-template <typename T>
-class FunctionWrapper0
-{
-public:
-    typedef T (*FunctionPointerType)();
-    typedef T result_type;
-    inline FunctionWrapper0(FunctionPointerType _functionPointer)
-    :functionPointer(_functionPointer) { }
-
-    inline T operator()()
-    {
-        return functionPointer();
-    }
-private:
-    FunctionPointerType functionPointer;
-};
-
 template <typename T, typename U>
 class FunctionWrapper1
 {
@@ -84,23 +67,6 @@ private:
     FunctionPointerType functionPointer;
 };
 
-template <typename T, typename U, typename V>
-class FunctionWrapper2
-{
-public:
-    typedef T (*FunctionPointerType)(U u, V v);
-    typedef T result_type;
-    inline FunctionWrapper2(FunctionPointerType _functionPointer)
-    :functionPointer(_functionPointer) { }
-
-    inline T operator()(U u, V v)
-    {
-        return functionPointer(u, v);
-    }
-private:
-    FunctionPointerType functionPointer;
-};
-
 template <typename T, typename C>
 class MemberFunctionWrapper
 {

src/concurrent/qtconcurrentmap.cpp

@@ -523,24 +523,12 @@
   \sa blockingMappedReduced(), {Concurrent Map and Map-Reduce}
 */
 
-/*!
-  \class QtConcurrent::FunctionWrapper0
-  \inmodule QtConcurrent
-  \internal
-*/
-
 /*!
   \class QtConcurrent::FunctionWrapper1
   \inmodule QtConcurrent
   \internal
 */
 
-/*!
-  \class QtConcurrent::FunctionWrapper2
-  \inmodule QtConcurrent
-  \internal
-*/
-
 /*!
   \class QtConcurrent::MemberFunctionWrapper
   \inmodule QtConcurrent