evas_textblock: remove logically dead code

Since `c->fmt` is allocated and dereferenced in `_layoutformat_push`, if
`c->fmt` is NULL, this causes a crash before checking for NULL.

Reviewed-by: Marcel Hollerbach <mail@marcel-hollerbach.de>
Differential Revision: https://phab.enlightenment.org/D12076

src/lib/evas/canvas/evas_object_textblock.c

@@ -7668,10 +7668,6 @@ _layout_setup(Ctxt *c, const Eo *eo_obj, Evas_Coord w, Evas_Coord h)
      {
         c->fmt = _layout_format_push(c, o->main_fmt, NULL);
      }
-   if (!c->fmt)
-     {
-        return EINA_FALSE;
-     }
 
    c->paragraphs = o->paragraphs;