mxssb: Eliminate target_cpu field

The command stream is now in a configuration file, the target_cpu
field is no longer used. Remove it.
Signed-off-by: Marek Vasut <marex@denx.de>

mxssb.c

@@ -27,12 +27,6 @@
 
 #include "mxssb.h"
 
-enum sb_target_cpu {
-	CPU_UNKNOWN,
-	CPU_MX23,
-	CPU_MX28
-};
-
 /*
  * IMAGE
  *   |-SECTION
@@ -78,7 +72,6 @@ struct sb_section_ctx {
 struct sb_image_ctx {
 	/* Image configuration */
 	unsigned int			verbose_boot:1;
-	enum sb_target_cpu		target_cpu;
 	char				*cfg_filename;
 
 	/* Number of section in the image */
@@ -1148,7 +1141,6 @@ int main(int argc, char **argv)
 
 	struct sb_image_ctx ctx;
 	memset(&ctx, 0, sizeof(ctx));
-	ctx.target_cpu = CPU_UNKNOWN;
 
 	while ((opt = getopt(argc, argv, "c:o:vh")) != -1) {
 		switch (opt) {