Make Applicative a superclass of Monad

Summary:
This includes pretty much all the changes needed to make `Applicative`
a superclass of `Monad` finally. There's mostly reshuffling in the
interests of avoid orphans and boot files, but luckily we can resolve
all of them, pretty much. The only catch was that
Alternative/MonadPlus also had to go into Prelude to avoid this.

As a result, we must update the hsc2hs and haddock submodules.

Signed-off-by: Austin Seipp <austin@well-typed.com>

Test Plan: Build things, they might not explode horribly.

Reviewers: hvr, simonmar

Subscribers: simonmar

Differential Revision: https://phabricator.haskell.org/D13

1 files changed, 1 insertions, 2 deletions

diff --git a/libraries/base/GHC/Event/Manager.hs b/libraries/base/GHC/Event/Manager.hs
index d55d5b1193..1dbe036e0e 100644
--- a/libraries/base/GHC/Event/Manager.hs
+++ b/libraries/base/GHC/Event/Manager.hs
@@ -51,12 +51,11 @@ module GHC.Event.Manager
 import Control.Concurrent.MVar (MVar, newMVar, readMVar, putMVar,
                                 tryPutMVar, takeMVar, withMVar)
 import Control.Exception (onException)
-import Control.Monad ((=<<), forM_, liftM, when, replicateM, void)
+import Control.Monad ((=<<), forM_, when, replicateM, void)
 import Data.Bits ((.&.))
 import Data.IORef (IORef, atomicModifyIORef', mkWeakIORef, newIORef, readIORef,
                    writeIORef)
 import Data.Maybe (Maybe(..), maybe)
-import Data.Monoid (mappend, mconcat, mempty)
 import GHC.Arr (Array, (!), listArray)
 import GHC.Base
 import GHC.Conc.Signal (runHandlers)