Remove vestigial tests/dot file.
Remove vestigial tests/dot file.

I think this might have once had some meaning under our old autoconf
setup.

sourcefrog/librsync,librsync/librsync,dbaarda/librsync,librsync/librsync,sourcefrog/librsync,dbaarda/librsync,librsync/librsync,librsync/librsync,sourcefrog/librsync,dbaarda/librsync,dbaarda/librsync,sourcefrog/librsync