dist: drop unused Clone derives

Author: djc

src/dist/download.rs

@@ -21,7 +21,6 @@ use crate::utils;
 
 const UPDATE_HASH_LEN: usize = 20;
 
-#[derive(Clone)]
 pub struct DownloadCfg<'a> {
     pub dist_root: &'a str,
     pub tmp_cx: &'a temp::Context,

src/dist/mod.rs

@@ -876,7 +876,6 @@ impl fmt::Display for Profile {
     }
 }
 
-#[derive(Clone)]
 pub(crate) struct DistOptions<'a> {
     pub(crate) cfg: &'a Cfg<'a>,
     pub(crate) toolchain: &'a ToolchainDesc,

src/install.rs

@@ -20,7 +20,6 @@ pub(crate) enum UpdateStatus {
     Unchanged,
 }
 
-#[derive(Clone)]
 pub(crate) enum InstallMethod<'a> {
     Copy {
         src: &'a Path,