Added new global macros for ERROR/WARNING/VERBOSE, use it

src/image.h

@@ -82,8 +82,4 @@ enum image_type image_type_from_string(const char * type);
 const char * image_type_to_string(enum image_type type);
 int image_hwrev_is_valid(struct image * image, const char * hwrev);
 
-extern int simulate;
-extern int noverify;
-extern int verbose;
-
 #endif