What's the deal with 'pango-bidi-type.c' ?

[John Emmas <john creativepost co uk>]

I just updated pango from git master and noticed commit #0a71013dfc 
(13th Nov 2017) which reads "Drop now unused mini-fribidi".

Maybe I'm confused about something but pango itself looks like 
"pango-bidi-type.c" is still included in the build.  In fact, it's 
needed for a couple of functions - such as 
'pango_log2vis_get_embedding_levels()'.  However, 'pango-bidi-type.c' 
#includes <fribidi.h> which doesn't exist any more.

Or does mini-fribidi now need to get built as a separate library? Thanks,

John