these are equal to the defaults

Change-Id: Ib1ab02264b7fc68af880c90f20d3244e42dab090

include/vcl/alpha.hxx

@@ -33,12 +33,11 @@ public:
 
                 AlphaMask();
                 AlphaMask( const Bitmap& rBitmap );
-                AlphaMask( const AlphaMask& rAlphaMask );
+                AlphaMask( const AlphaMask& rAlphaMask ) = default;
                 AlphaMask( const Size& rSizePixel, sal_uInt8* pEraseTransparency = nullptr );
-    virtual     ~AlphaMask() override;
 
     AlphaMask&  operator=( const Bitmap& rBitmap );
-    AlphaMask&  operator=( const AlphaMask& rAlphaMask ) { return static_cast<AlphaMask&>( Bitmap::operator=( rAlphaMask ) ); }
+    AlphaMask&  operator=( const AlphaMask& rAlphaMask ) = default;
     bool        operator!() const { return Bitmap::operator!(); }
     bool        operator==( const AlphaMask& rAlphaMask ) const { return Bitmap::operator==( rAlphaMask ); }
     bool        operator!=( const AlphaMask& rAlphaMask ) const { return Bitmap::operator!=( rAlphaMask ); }

vcl/source/gdi/alpha.cxx

@@ -33,11 +33,6 @@ AlphaMask::AlphaMask( const Bitmap& rBitmap ) :
         Bitmap::Convert( BMP_CONVERSION_8BIT_GREYS );
 }
 
-AlphaMask::AlphaMask( const AlphaMask& rAlphaMask ) :
-    Bitmap( rAlphaMask )
-{
-}
-
 AlphaMask::AlphaMask( const Size& rSizePixel, sal_uInt8* pEraseTransparency ) :
     Bitmap( rSizePixel, 8, &Bitmap::GetGreyPalette( 256 ) )
 {
@@ -45,10 +40,6 @@ AlphaMask::AlphaMask( const Size& rSizePixel, sal_uInt8* pEraseTransparency ) :
         Bitmap::Erase( Color( *pEraseTransparency, *pEraseTransparency, *pEraseTransparency ) );
 }
 
-AlphaMask::~AlphaMask()
-{
-}
-
 AlphaMask& AlphaMask::operator=( const Bitmap& rBitmap )
 {
     *static_cast<Bitmap*>(this) = rBitmap;