Merge pull request #2018 from sylvestre/revert-cat

Fix bug #2017 - cat isn't working

Cargo.lock

@@ -1581,8 +1581,7 @@ name = "uu_cat"
 version = "0.0.5"
 dependencies = [
  "clap",
- "nix 0.20.0",
- "thiserror",
+ "quick-error",
  "unix_socket",
  "uucore",
  "uucore_procs",

src/uu/cat/Cargo.toml

@@ -16,16 +16,13 @@ path = "src/cat.rs"
 
 [dependencies]
 clap = "2.33"
-thiserror = "1.0"
+quick-error = "1.2.3"
 uucore = { version=">=0.0.8", package="uucore", path="../../uucore", features=["fs"] }
 uucore_procs = { version=">=0.0.5", package="uucore_procs", path="../../uucore_procs" }
 
 [target.'cfg(unix)'.dependencies]
 unix_socket = "0.5.0"
 
-[target.'cfg(any(target_os = "linux", target_os = "android"))'.dependencies]
-nix = "0.20"
-
 [[bin]]
 name = "cat"
 path = "src/main.rs"