Remove commented obfsbridges from TBB torrc
Around when 3.5 was released, I put the list of obfsbridges in torrc so they wouldn't get lost, but commented out so they wouldn't run by default. Now we have the list of bridges in two other places:
- https://www.torproject.org/docs/faq.html.en#PluggableTransports We're currently asking users to copy and paste from one of those places in order to activate pluggable transports. (I think #10418 (moved) is the long-term goal of where the list should live.) Let's remove the list from torrc so that we don't have so many things to keep in sync.