cppuhelper: MSVC: pragma warning: make more specific, remove obsolete

Change-Id: Ib097ea1764d275a3123d0dccf05d52315b4858a1
Reviewed-on: https://gerrit.libreoffice.org/48971
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

cppuhelper/source/interfacecontainer.cxx

@@ -55,10 +55,6 @@ static void sequenceRemoveElementAt( Sequence< Reference< XInterface > > & rSeq,
     rSeq = aDestSeq;
 }
 
-#ifdef _MSC_VER
-#pragma warning( disable: 4786 )
-#endif
-
 OInterfaceIteratorHelper::OInterfaceIteratorHelper( OInterfaceContainerHelper & rCont_ )
     : rCont( rCont_ )
 {

include/cppuhelper/propertysetmixin.hxx

@@ -56,12 +56,6 @@ namespace cppu {
 
 template< typename T > class PropertySetMixin;
 
-// Suppress warnings about virtual functions but non-virtual destructor:
-#if defined _MSC_VER
-#pragma warning(push)
-#pragma warning(disable: 4265)
-#endif
-
 /**
    @short A helper base class for <code>cppu::PropertySetMixin</code>.
 
@@ -429,10 +423,6 @@ private:
 #pragma GCC diagnostic pop
 #endif
 
-#if defined _MSC_VER
-#pragma warning(pop)
-#endif
-
 }
 
 #endif

include/cppuhelper/propshlp.hxx

@@ -661,8 +661,6 @@ protected:
 #endif
 // Suppress warning about virtual functions but non-virtual destructor:
 #if defined _MSC_VER
-#pragma warning(push)
-#pragma warning(disable: 4265)
 #if defined __clang__
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wnon-virtual-dtor"
@@ -677,7 +675,6 @@ protected:
 #if defined __clang__
 #pragma clang diagnostic pop
 #endif
-#pragma warning(pop)
 #endif
 
 /**