David Pursehouse ba7bc738c1 Sync: Refactor netrc parsing
Don't emit a message when the netrc file doesn't exist or couldn't
be opened.

Instead of trying to unpack the result of info.authenticators() and
catching the resulting TypeError when it's None, first store it to
a local and only unpack it if it has a value.

Also remove an unused import.

Change-Id: I5c404d91e48c261c1ab850c3e5f040c4f4c235cb
2015-08-20 17:05:17 +09:00
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