Edje: remove a unreachable code from edje_text.c

Summary:
If "text" is NULL, it is set as empty string in the above code.
So, the removed line is unreachable.

Test Plan: N/A

Reviewers: raster, cedric, herdsman, woohyun, jpeg, Hermet

Reviewed By: Hermet

Differential Revision: https://phab.enlightenment.org/D4462

src/lib/edje/edje_text.c

@@ -297,7 +297,6 @@ _edje_text_recalc_apply(Edje *ed, Edje_Real_Part *ep,
    _edje_calc_params_need_type_text(params);
    if (params->type.text->size)
      size = params->type.text->size;
-   if (!text) text = "";
 
    if ((text == ep->typedata.text->cache.in_str)
        || (text && ep->typedata.text->cache.in_str && !strcmp(ep->typedata.text->cache.in_str, text)))