Remove redirect_std*(f, stream) definitions for Julia prior to v0.6

Were added in #275.

README.md

@@ -122,8 +122,6 @@ Currently, the `@compat` macro supports the following syntaxes:
 
 * [`normalize`](http://docs.julialang.org/en/latest/stdlib/linalg/?highlight=normalize#Base.normalize) and [`normalize!`](http://docs.julialang.org/en/latest/stdlib/linalg/?highlight=normalize#Base.normalize!), normalizes a vector with respect to the p-norm ([#13681])
 
-* `redirect_stdout`, `redirect_stderr`, and `redirect_stdin` take an optional function as a first argument, `redirect_std*(f, stream)`, so that one may use `do` block syntax (as first available for Julia 0.6)
-
 * `unsafe_get` returns the `:value` field of a `Nullable` object without any null-check and has a generic fallback for non-`Nullable` argument ([#18484])
 
 * `isnull` has a generic fallback for non-`Nullable` argument

src/Compat.jl

@@ -87,17 +87,6 @@ end
         eval(mod, :(include_string($code, $fname)))
 end
 
-import Base: redirect_stdin, redirect_stdout, redirect_stderr
-if VERSION < v"0.6.0-dev.374"
-    for (F,S) in ((:redirect_stdin, :STDIN), (:redirect_stdout, :STDOUT), (:redirect_stderr, :STDERR))
-        @eval function $F(f::Function, stream)
-            STDOLD = $S
-            $F(stream)
-            try f() finally $F(STDOLD) end
-        end
-    end
-end
-
 @static if VERSION < v"0.6.0-dev.528"
     macro __DIR__()
         Base.source_dir()

test/runtests.jl

@@ -21,34 +21,6 @@ for os in [:apple, :bsd, :linux, :unix, :windows]
     @eval @test Compat.Sys.$(Symbol("is", os))() == $from_base()
 end
 
-# do-block redirect_std*
-# 0.6
-let filename = tempname()
-    ret = open(filename, "w") do f
-        redirect_stdout(f) do
-            println("hello")
-            [1,3]
-        end
-    end
-    @test ret == [1,3]
-    @test chomp(read(filename, String)) == "hello"
-    ret = open(filename, "w") do f
-        redirect_stderr(f) do
-            println(stderr, "WARNING: hello")
-            [2]
-        end
-    end
-    @test ret == [2]
-    @test occursin("WARNING: hello", read(filename, String))
-    ret = open(filename) do f
-        redirect_stdin(f) do
-            readline()
-        end
-    end
-    @test occursin("WARNING: hello", ret)
-    rm(filename)
-end
-
 # 0.6
 @test @__DIR__() == dirname(@__FILE__)