Drop support for Tor v2 hidden services

[rorp]

Inspired by #2234

[codecov-commenter]

Codecov Report

Merging #2296 (52f8182) into master (9610fe3) will increase coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2296      +/-   ##
==========================================
+ Coverage   84.29%   84.35%   +0.05%     
==========================================
  Files         194      194              
  Lines       14428    14419       -9     
  Branches      599      570      -29     
==========================================
+ Hits        12162    12163       +1     
+ Misses       2266     2256      -10     

Impacted Files	Coverage Δ
...ir-core/src/main/scala/fr/acinq/eclair/Setup.scala	79.44% <ø> (+0.43%)	⬆️
...scala/fr/acinq/eclair/tor/TorProtocolHandler.scala	93.00% <100.00%> (+1.33%)	⬆️
...in/scala/fr/acinq/eclair/channel/fsm/Channel.scala	88.39% <0.00%> (+0.11%)	⬆️
...main/scala/fr/acinq/eclair/io/PeerConnection.scala	85.23% <0.00%> (+0.36%)	⬆️
...cala/fr/acinq/eclair/payment/relay/NodeRelay.scala	97.56% <0.00%> (+1.62%)	⬆️
.../acinq/eclair/blockchain/bitcoind/ZmqWatcher.scala	88.13% <0.00%> (+2.54%)	⬆️

[t-bast]

LGTM, thanks!