Remove defintions of xor and ⊻

Were added in #289.

README.md

@@ -273,8 +273,6 @@ Currently, the `@compat` macro supports the following syntaxes:
 
 * `reprmime(mime, x)` is now `repr(mime, x)` ([#25990]) and `mimewritable` is now `showable` ([#26089]).
 
-* `$` is now `xor` or `⊻` ([#18977])
-
 * `num` and `den` are now `numerator` and `denominator` ([#19246])
 
 * `takebuf_array` is now a method of `take!`. `takebuf_string(io)` becomes `String(take!(io))` ([#19088])
@@ -482,7 +480,6 @@ includes this fix. Find the minimum version from there.
 [#18082]: https://github.com/JuliaLang/julia/issues/18082
 [#18629]: https://github.com/JuliaLang/julia/issues/18629
 [#18727]: https://github.com/JuliaLang/julia/issues/18727
-[#18977]: https://github.com/JuliaLang/julia/issues/18977
 [#19088]: https://github.com/JuliaLang/julia/issues/19088
 [#19246]: https://github.com/JuliaLang/julia/issues/19246
 [#19449]: https://github.com/JuliaLang/julia/issues/19449

src/Compat.jl

@@ -142,14 +142,6 @@ else
  end
 end
 
-# julia#18977
-@static if !isdefined(Base, :xor)
- # 0.6
- const xor = $
- const ⊻ = xor
- export xor, ⊻
-end
-
 # julia#19246
 @static if !isdefined(Base, :numerator)
  # 0.6

test/runtests.jl

@@ -40,9 +40,6 @@ else
  end
 end
 
-@test xor(1,5) == 4
-@test 1 ⊻ 5 == 4
-
 # supertype operator
 @test !(Int >: Integer)
 @test Integer >: Int