Make CI green again (#768)

* Force clap version to 4.4.9 to respect MSRV

Version of clap above 4.4.9 require Rust 1.74, which exceeds
criterion's MSRV of 1.70.

* Do not redundantly import `std::iter::IntoIterator`

Rust now warns about duplicate imports. `std::iter::IntoIterator` is
part of the Rust prelude since Rust 2015. This prevents
`criterion-plot` from compiling with recent Rust versions because of
`#![deny(warnings)]`.

Cargo.toml

@@ -28,7 +28,7 @@ serde          = "1.0"
 serde_json     = "1.0"
 serde_derive   = "1.0"
 ciborium       = "0.2.0"
-clap           = { version = "4", default-features = false, features = ["std", "help"] }
+clap           = { version = "=4.4.9", default-features = false, features = ["std", "help"] }
 walkdir        = "2.3"
 tinytemplate   = "1.1"
 cast           = "0.3"

plot/src/axis.rs

@@ -1,7 +1,6 @@
 //! Coordinate axis
 
 use std::borrow::Cow;
-use std::iter::IntoIterator;
 
 use crate::map;
 use crate::traits::{Configure, Data, Set};

plot/src/candlestick.rs

@@ -1,7 +1,6 @@
 //! "Candlestick" plots
 
 use std::borrow::Cow;
-use std::iter::IntoIterator;
 
 use crate::data::Matrix;
 use crate::traits::{self, Data, Set};

plot/src/curve.rs

@@ -1,7 +1,6 @@
 //! Simple "curve" like plots
 
 use std::borrow::Cow;
-use std::iter::IntoIterator;
 
 use crate::data::Matrix;
 use crate::traits::{self, Data, Set};

plot/src/errorbar.rs

@@ -1,7 +1,6 @@
 //! Error bar plots
 
 use std::borrow::Cow;
-use std::iter::IntoIterator;
 
 use crate::data::Matrix;
 use crate::traits::{self, Data, Set};

plot/src/filledcurve.rs

@@ -1,7 +1,6 @@
 //! Filled curve plots
 
 use std::borrow::Cow;
-use std::iter::IntoIterator;
 
 use crate::data::Matrix;
 use crate::traits::{self, Data, Set};