[MacPorts] #55711: mediainfo, mediainfolib: Remove master_sites override

[MacPorts]

#55711: mediainfo, mediainfolib: Remove master_sites override
------------------------+-------------------------------------
 Reporter:  ryandesign  |      Owner:  ctreleaven
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:  haspatch    |       Port:  mediainfo, mediainfolib
------------------------+-------------------------------------
 Next time the version of the mediainfo and mediainfolib ports is updated,
 please remove this line:

 {{{
 master_sites
 https://github.com/MediaArea/${name}/archive/v${version}
 }}}

 It is not recommended to override the `master_sites` set by the portgroup,
 if your intention is to fetch from a standard GitHub URL.

 But don't remove it without also updating the port's version, because it
 will cause the distfile's checksums to change.

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Ticket URL: <https://trac.macports.org/ticket/55711>
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