Chutney: remove support for Tor's pre-0.3.5 directory structure
test-network*.sh still supports Tor's pre-0.3.5 directory structure. And there may be other Tor 0.2.9 code in chutney.
Now that 0.2.9 is unsupported, we can remove this code.
We should be able to find it by grepping for "0.2.9", "029", "src/or", "src/common", "0.3.5", or "035".
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