libxlu: avoid having two definitions of XLU_ConfigList

There is already a typedef in libxlutil.h. Remove the one in
libxlu_internal.h.

Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

tools/libxl/libxlu_internal.h

@@ -25,11 +25,11 @@
 
 #include "libxlutil.h"
 
-typedef struct XLU_ConfigList {
+struct XLU_ConfigList {
     int avalues; /* available slots */
     int nvalues; /* actual occupied slots */
     XLU_ConfigValue **values;
-} XLU_ConfigList;
+};
 
 typedef struct YYLTYPE
 {