Update Rust edition to 2021 🎉

wgpu/Cargo.toml

@@ -2,7 +2,7 @@
 name = "iced_wgpu"
 version = "0.4.0"
 authors = ["Héctor Ramón Jiménez <hector0193@gmail.com>"]
-edition = "2018"
+edition = "2021"
 description = "A wgpu renderer for Iced"
 license = "MIT AND OFL-1.1"
 repository = "https://github.com/iced-rs/iced"

wgpu/src/image/raster.rs

@@ -163,8 +163,6 @@ impl Operation {
     where
         R: std::io::BufRead + std::io::Seek,
     {
-        use std::convert::TryFrom;
-
         let exif = exif::Reader::new().read_from_container(reader)?;
 
         Ok(exif