uxtheme: Remove unused code.

dlls/uxtheme/buffer.c

@@ -52,8 +52,6 @@ static void free_paintbuffer(struct paintbuffer *buffer)
 
 static struct paintbuffer *get_buffer_obj(HPAINTBUFFER handle)
 {
-    if (!handle)
-        return NULL;
     return handle;
 }
 

dlls/uxtheme/msstyles.c

@@ -46,8 +46,6 @@ static BOOL MSSTYLES_GetNextToken(LPCWSTR lpStringStart, LPCWSTR lpStringEnd, LP
 static void MSSTYLES_ParseThemeIni(PTHEME_FILE tf, BOOL setMetrics);
 static HRESULT MSSTYLES_GetFont (LPCWSTR lpStringStart, LPCWSTR lpStringEnd, LPCWSTR *lpValEnd, LOGFONTW* logfont);
 
-extern int alphaBlendMode;
-
 #define MSSTYLES_VERSION 0x0003
 
 static PTHEME_FILE tfActiveTheme;