Remove checks for CSIDL_XXX and SHGFP_TYPE_XXX.

<https://msdn.microsoft.com/en-us/library/windows/desktop/bb762494(v=vs.85).aspx>
<https://msdn.microsoft.com/en-us/library/windows/desktop/bb762181(v=vs.85).aspx>

src/msw/stdpaths.cpp

@@ -51,34 +51,10 @@ typedef HRESULT (WINAPI *SHGetKnownFolderPath_t)(const GUID&, DWORD, HANDLE, PWS
 // used in our wxLogTrace messages
 #define TRACE_MASK wxT("stdpaths")
 
-#ifndef CSIDL_APPDATA
-    #define CSIDL_APPDATA         0x001a
-#endif
-
-#ifndef CSIDL_LOCAL_APPDATA
-    #define CSIDL_LOCAL_APPDATA   0x001c
-#endif
-
-#ifndef CSIDL_COMMON_APPDATA
-    #define CSIDL_COMMON_APPDATA  0x0023
-#endif
-
-#ifndef CSIDL_PROGRAM_FILES
-    #define CSIDL_PROGRAM_FILES   0x0026
-#endif
-
 #ifndef CSIDL_PERSONAL
     #define CSIDL_PERSONAL        0x0005
 #endif
 
-#ifndef SHGFP_TYPE_CURRENT
-    #define SHGFP_TYPE_CURRENT 0
-#endif
-
-#ifndef SHGFP_TYPE_DEFAULT
-    #define SHGFP_TYPE_DEFAULT 1
-#endif
-
 // ----------------------------------------------------------------------------
 // module globals
 // ----------------------------------------------------------------------------