Update to error-chain 0.2.2

Author: brson

Cargo.lock

@@ -1,8 +1,4 @@
 error_chain! {
-    types {
-        Error, ErrorKind, ChainErr, Result;
-    }
-
     links { }
 
     foreign_links { }

src/download/src/errors.rs

@@ -7,10 +7,6 @@ use rustup_dist::{self, temp};
 use rustup_utils;
 
 error_chain! {
-    types {
-        Error, ErrorKind, ChainErr, Result;
-    }
-
     links {
         rustup::Error, rustup::ErrorKind, Rustup;
         rustup_dist::Error, rustup_dist::ErrorKind, Dist;

src/rustup-cli/errors.rs

@@ -6,10 +6,6 @@ use rustup_utils;
 use manifest::Component;
 
 error_chain! {
-    types {
-        Error, ErrorKind, ChainErr, Result;
-    }
-
     links {
         rustup_utils::Error, rustup_utils::ErrorKind, Utils;
     }

src/rustup-dist/src/errors.rs

@@ -4,10 +4,6 @@ use url::Url;
 use download;
 
 error_chain! {
-    types {
-        Error, ErrorKind, ChainErr, Result;
-    }
-
     links {
         download::Error, download::ErrorKind, Download;
     }

src/rustup-utils/src/errors.rs

@@ -4,10 +4,6 @@ use rustup_dist::manifest::Component;
 use toml;
 
 error_chain! {
-    types {
-        Error, ErrorKind, ChainErr, Result;
-    }
-
     links {
         rustup_dist::Error, rustup_dist::ErrorKind, Dist;
         rustup_utils::Error, rustup_utils::ErrorKind, Utils;