Revert "freetype: fix crash (wrong memory deallocation)"

This reverts commit 2224fa03.

FT_Done_Glyph seems needed for shadow. More investigation needed to
work out why libfreetype crashes at this FT_Done_Glyph.

modules/text_renderer/freetype.c

@@ -1776,6 +1776,8 @@ static int GetGlyph( filter_t *p_filter,
         FT_Done_Glyph( glyph );
         if( outline )
             FT_Done_Glyph( outline );
+        if( shadow )
+            FT_Done_Glyph( shadow );
         return VLC_EGENERIC;
     }
     FT_Glyph_Get_CBox( glyph, ft_glyph_bbox_pixels, p_glyph_bbox );