Remove localhost hack

Dependencies

• [2] VZKB5CIE Workaround for RemoteStore not supporting cmdBuildDerivation yet
• [3] NAYQT2GT hydra-queue-runner: Use cmdBuildDerivation
• [4] OCZ4LSGG Automatically retry aborted builds
• [5] N4IROACV Move buildRemote() into State
• [*] 5AIYUMTB Basic remote building

Change contents

• replacement in src/hydra-queue-runner/build-remote.cc at line 168
  [3.655]→[2.0:90](∅→∅)
  − if (GET_PROTOCOL_MINOR(version) >= 1 && machine->sshName != "localhost") // FIXME
  [3.655]

  [3.268]
  + if (GET_PROTOCOL_MINOR(version) >= 1)