Revert "fix Propellor/Exception.hs for GHC 7.6.3"
Revert "fix Propellor/Exception.hs for GHC 7.6.3"

This reverts commit ffcf9ca8c438a7f3a5f12623859199b5b12b6255.

Félix fixed this more comprehensively.

ArchiveTeam/glowing-computing-machine