Remove some unnecessary FFI implementations

Author: hdgarrood

src/Node/FS/Async.js

@@ -4,8 +4,6 @@
 
 // module Node.FS.Async
 
-exports.fs = require('fs');
-
 exports.handleCallbackImpl = function (left, right, f) {
   return function (err, value) {
     if (err) {

src/Node/FS/Async.purs

@@ -61,7 +61,7 @@ foreign import handleCallbackImpl ::
 handleCallback :: forall eff a. (Callback eff a) -> JSCallback a
 handleCallback cb = runFn3 handleCallbackImpl Left Right cb
 
-foreign import fs ::
+fs ::
   { rename :: Fn3 FilePath FilePath (JSCallback Unit) Unit
   , truncate :: Fn3 FilePath Int (JSCallback Unit) Unit
   , chown :: Fn4 FilePath Int Int (JSCallback Unit) Unit
@@ -85,6 +85,7 @@ foreign import fs ::
   , write :: Fn6 FileDescriptor Buffer BufferOffset BufferLength (Nullable FilePosition) (JSCallback ByteCount) Unit
   , close :: Fn2 FileDescriptor (JSCallback Unit) Unit
   }
+fs = unsafeRequireFS
 
 -- | Type synonym for callback functions.
 type Callback eff a = Either Error a -> Eff (fs :: FS | eff) Unit

src/Node/FS/Sync.js

@@ -49,7 +49,7 @@ import Node.Path (FilePath())
 import Node.FS.Perms
 import Node.FS.Internal
 
-foreign import fs ::
+fs ::
   { renameSync :: Fn2 FilePath FilePath Unit
   , truncateSync :: Fn2 FilePath Int Unit
   , chownSync :: Fn3 FilePath Int Int Unit
@@ -74,6 +74,7 @@ foreign import fs ::
   , fsyncSync :: Fn1 FileDescriptor Unit
   , closeSync :: Fn1 FileDescriptor Unit
   }
+fs = unsafeRequireFS
 
 -- | Renames a file.
 rename :: forall eff. FilePath