snapshot: simplify filter code.

src/bin/snapshot_widgets_file_icons.c

@@ -84,10 +84,7 @@ static void _setup(void)
      }
 
    const char *filter =
-      "a = buffer { 'rgba' }"
-      "blend {}"
-      "blur { 5, dst = a }"
-      "blend { src = a, color = '#ff08' }"
+      "blur { 5, dst = a, color = '#ff08' }"
      ;
 
    o = eo_add(EVAS_IMAGE_CLASS, evas);