refactor: clippy autofix

Former-commit-id: da7665869588cdb52e96ceeb2edcb7e7c13a4d44
Former-commit-id: 785d0e54cf09f781feecffd6512f3353d6b150e5

platform/rustboyadvance-sdl2/src/audio.rs

@@ -1,4 +1,3 @@
-use sdl2;
 use sdl2::audio::{AudioCallback, AudioDevice, AudioFormat, AudioSpec, AudioSpecDesired};
 
 use rustboyadvance_core::prelude::SimpleAudioInterface;

platform/rustboyadvance-sdl2/src/input.rs

@@ -4,7 +4,6 @@ use sdl2::keyboard::Scancode;
 
 use rustboyadvance_core::keypad as gba_keypad;
 
-use bit;
 use bit::BitIndex;
 
 pub fn on_keyboard_key_down(key_state: &mut u16, scancode: Scancode) {

platform/rustboyadvance-sdl2/src/main.rs

@@ -3,8 +3,6 @@ use sdl2::event::Event;
 use sdl2::keyboard::Scancode;
 use sdl2::{self};
 
-use bytesize;
-use spin_sleep;
 use structopt::StructOpt;
 
 use std::fs;
@@ -14,7 +12,6 @@ use std::time;
 
 #[macro_use]
 extern crate log;
-use flexi_logger;
 use flexi_logger::*;
 
 mod audio;
@@ -29,7 +26,7 @@ use rustboyadvance_utils::FpsCounter;
 const LOG_DIR: &str = ".logs";
 
 fn ask_download_bios() {
-    const OPEN_SOURCE_BIOS_URL: &'static str =
+    const OPEN_SOURCE_BIOS_URL: &str =
         "https://github.com/Nebuleon/ReGBA/raw/master/bios/gba_bios.bin";
     println!("Missing BIOS file. If you don't have the original GBA BIOS, you can download an open-source bios from {}", OPEN_SOURCE_BIOS_URL);
     std::process::exit(0);
@@ -46,7 +43,7 @@ fn load_bios(bios_path: &Path) -> Box<[u8]> {
 }
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    fs::create_dir_all(LOG_DIR).expect(&format!("could not create log directory ({})", LOG_DIR));
+    fs::create_dir_all(LOG_DIR).unwrap_or_else(|_| panic!("could not create log directory ({})", LOG_DIR));
     flexi_logger::Logger::with_env_or_str("info")
         .log_to_file()
         .directory(LOG_DIR)
@@ -84,7 +81,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
     let mut renderer = video::init(&sdl_context)?;
     let (audio_interface, mut _sdl_audio_device) = audio::create_audio_player(&sdl_context)?;
-    let mut rom_name = opts.rom_name();
+    let rom_name = opts.rom_name();
 
     let bios_bin = load_bios(&opts.bios);
 
@@ -194,9 +191,9 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                     };
                     if removed {
                         let name = active_controller
-                            .and_then(|controller| Some(controller.name()))
+                            .map(|controller| Some(controller.name()))
                             .unwrap();
-                        info!("Removing game controller: {}", name);
+                        info!("Removing game controller: {:?}", name);
                         active_controller = None;
                     }
                 }
@@ -208,7 +205,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                     }
                 }
                 Event::Quit { .. } => break 'running,
-                Event::DropFile { filename, .. } => {
+                Event::DropFile {  .. } => {
                     todo!("impl DropFile again")
                 }
                 _ => {}

platform/rustboyadvance-sdl2/src/options.rs

@@ -1,4 +1,4 @@
-use std::{io, path::PathBuf};
+use std::{path::PathBuf};
 
 use rustboyadvance_core::{
     cartridge::{BackupType, GamepakBuilder},

platform/rustboyadvance-sdl2/src/video.rs

@@ -22,7 +22,7 @@ pub struct Renderer<'a> {
     image_context: Sdl2ImageContext,
 }
 
-pub fn init<'a>(sdl_context: &'a Sdl) -> Result<Renderer<'a>, Box<dyn std::error::Error>> {
+pub fn init(sdl_context: &Sdl) -> Result<Renderer<'_>, Box<dyn std::error::Error>> {
     let video_subsystem = sdl_context.video()?;
     let image_context = sdl2::image::init(InitFlag::PNG | InitFlag::JPG)?;
     let mut window = video_subsystem
@@ -57,7 +57,7 @@ pub fn init<'a>(sdl_context: &'a Sdl) -> Result<Renderer<'a>, Box<dyn std::error
 
 impl<'a> Renderer<'a> {
     pub fn set_window_title(&mut self, title: &str) {
-        self.canvas.window_mut().set_title(&title).unwrap();
+        self.canvas.window_mut().set_title(title).unwrap();
     }
 
     pub fn render(&mut self, buffer: &[u32]) {