minuitwrp: remove unused variable

Change-Id: I0beb3b349efd4f08491c92bb51c12caf3653cb73
Signed-off-by: ramsudharsan <ramsudharsanm@gmail.com>
diff --git a/minuitwrp/graphics_overlay.c b/minuitwrp/graphics_overlay.c
index 61d9ecf..80e64d7 100644
--- a/minuitwrp/graphics_overlay.c
+++ b/minuitwrp/graphics_overlay.c
@@ -86,7 +86,6 @@
 
 bool target_has_overlay(char *version)
 {
-    int ret;
     int mdp_version;
 
     if (strlen(version) >= 8) {