edje edje_cc: remove beta tag for vector part.

vector part has been used since 2014, now it's widely used in many cases.
let's remove the beta tag, it's mature using in svg.

src/bin/edje/edje_cc_out.c

@@ -1393,9 +1393,6 @@ data_write_vectors(Eet_File *ef, int *vector_num)
    buf = eina_strbuf_new();
    for (i = 0; i < edje_file->image_dir->vectors_count; i++)
      {
-        if (!beta)
-          error_and_abort(ef, "Vector part are currently a beta feature, please enable them by running edje_cc with -beta.");
-
         vector = &edje_file->image_dir->vectors[i];
         EINA_LIST_FOREACH(img_dirs, ll, s)
           {