stack/cloudoo: remove ffmpeg until compilation on gcc 6.3 is fixed

ffmpeg is not a strong dependencies for typical cloudooo use case and
this component no longer compile on gcc 6.3

stack/cloudooo.cfg

@@ -8,7 +8,6 @@ extends =
   ../component/dash/buildout.cfg
   ../component/dbus/buildout.cfg
   ../component/dcron/buildout.cfg
-  ../component/ffmpeg/buildout.cfg
   ../component/file/buildout.cfg
   ../component/fonts/buildout.cfg
   ../component/git/buildout.cfg
@@ -69,7 +68,6 @@ parts =
   wkhtmltopdf
   file
   poppler
-  ffmpeg
 
   rdiff-backup
   apache