liblights: remove unused variable

Change-Id: I2ce04975d4ff0a796e9f7c531f37c32ff88eaf10
diff --git a/liblights/lights.c b/liblights/lights.c
index 875cf65..92034ea 100644
--- a/liblights/lights.c
+++ b/liblights/lights.c
@@ -178,7 +178,6 @@
 
     char blink[32];
     int count, err;
-    int color;
 
     if (led == NULL)
         led = &led_off;