updated docs, fixed unused type variable warnings

Author: Thimoteus

docs/Node/Stream.md

@@ -139,7 +139,7 @@ Write a chunk to a writable stream.
 #### `writeString`
 
 ``` purescript
-writeString :: forall r eff a. Writable r eff String -> Encoding -> String -> Eff eff Unit -> Eff eff Boolean
+writeString :: forall r eff. Writable r eff String -> Encoding -> String -> Eff eff Unit -> Eff eff Boolean
 ```
 
 Write a string in the specified encoding to a writable stream.

src/Node/Stream.purs

@@ -87,10 +87,10 @@ foreign import pipe :: forall r w eff a. Readable w eff a -> Writable r eff a ->
 -- | Write a chunk to a writable stream.
 foreign import write :: forall r eff a. Writable r eff String -> a -> Eff eff Unit -> Eff eff Boolean
 
-foreign import writeStringImpl :: forall r eff a. Writable r eff String -> String -> String -> Eff eff Unit -> Eff eff Boolean
+foreign import writeStringImpl :: forall r eff. Writable r eff String -> String -> String -> Eff eff Unit -> Eff eff Boolean
 
 -- | Write a string in the specified encoding to a writable stream.
-writeString :: forall r eff a. Writable r eff String -> Encoding -> String -> Eff eff Unit -> Eff eff Boolean
+writeString :: forall r eff. Writable r eff String -> Encoding -> String -> Eff eff Unit -> Eff eff Boolean
 writeString w enc = writeStringImpl w (show enc)
 
 -- | Force buffering of writes.
@@ -106,4 +106,4 @@ setDefaultEncoding :: forall r eff. Writable r eff String -> Encoding -> Eff eff
 setDefaultEncoding r enc = setDefaultEncodingImpl r (show enc)
 
 -- | End writing data to the stream.
-foreign import end :: forall r eff a. Writable r eff a -> Eff eff Unit -> Eff eff Unit
+foreign import end :: forall r eff a. Writable r eff a -> Eff eff Unit -> Eff eff Unit