Remove unused structure definition.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4503 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/vncviewer/Win32PixelBuffer.cxx b/vncviewer/Win32PixelBuffer.cxx
index e9f0e98..71e18c4 100644
--- a/vncviewer/Win32PixelBuffer.cxx
+++ b/vncviewer/Win32PixelBuffer.cxx
@@ -33,18 +33,6 @@
 
 static rfb::LogWriter vlog("PlatformPixelBuffer");
 
-struct BitmapInfo {
-  BITMAPINFOHEADER bmiHeader;
-  union {
-    struct {
-      DWORD red;
-      DWORD green;
-      DWORD blue;
-    } mask;
-    RGBQUAD color[256];
-  };
-};
-
 PlatformPixelBuffer::PlatformPixelBuffer(int width, int height) :
   FullFramePixelBuffer(rfb::PixelFormat(32, 24, false, true,
                                         255, 255, 255, 16, 8, 0),