imx8image: Remove unused cont_img_count variable

With clang-15, it is now reported that cont_img_count is unused. This is
true as the code will increment / reset this counter, but never
functionally use it. Remove it.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
diff --git a/tools/imx8image.c b/tools/imx8image.c
index 395d5c6..c25ea84 100644
--- a/tools/imx8image.c
+++ b/tools/imx8image.c
@@ -829,7 +829,6 @@
 	int ret;
 
 	int container = -1;
-	int cont_img_count = 0; /* indexes to arrange the container */
 
 	memset((char *)&imx_header, 0, sizeof(imx_header_v3_t));
 
@@ -879,7 +878,6 @@
 			img_sp->src = file_off;
 
 			file_off += ALIGN(sbuf.st_size, sector_size);
-			cont_img_count++;
 			break;
 
 		case SECO:
@@ -899,7 +897,6 @@
 			img_sp->src = file_off;
 
 			file_off += sbuf.st_size;
-			cont_img_count++;
 			break;
 
 		case NEW_CONTAINER:
@@ -908,8 +905,6 @@
 				      CONTAINER_ALIGNMENT,
 				      CONTAINER_FLAGS_DEFAULT,
 				      fuse_version);
-			/* reset img count when moving to new container */
-			cont_img_count = 0;
 			scfw_flags = 0;
 			break;