Fix warnings

src/main.rs

@@ -24,11 +24,11 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let mut event_loop: EventLoop<CalloopData> = EventLoop::try_new()?;
 
     let mut display: Display<Smallvil> = Display::new()?;
-    let state = Smallvil::new(&mut event_loop, &mut display);
+    let state = Smallvil::new(&event_loop, &mut display);
 
     let mut data = CalloopData { state, display };
 
-    crate::winit::init_winit(&mut event_loop, &mut data)?;
+    crate::winit::init_winit(&event_loop, &mut data)?;
 
     let mut args = std::env::args().skip(1);
     let flag = args.next();

src/state.rs

@@ -39,7 +39,7 @@ pub struct Smallvil {
 }
 
 impl Smallvil {
-    pub fn new(event_loop: &mut EventLoop<CalloopData>, display: &mut Display<Self>) -> Self {
+    pub fn new(event_loop: &EventLoop<CalloopData>, display: &mut Display<Self>) -> Self {
         let start_time = std::time::Instant::now();
 
         let dh = display.handle();
@@ -94,7 +94,7 @@ impl Smallvil {
 
     fn init_wayland_listener(
         display: &mut Display<Smallvil>,
-        event_loop: &mut EventLoop<CalloopData>,
+        event_loop: &EventLoop<CalloopData>,
     ) -> OsString {
         // Creates a new listening socket, automatically choosing the next available `wayland`
         // socket name.

src/winit.rs

@@ -12,7 +12,7 @@ use smithay::utils::{Rectangle, Transform};
 use crate::{CalloopData, Smallvil};
 
 pub fn init_winit(
-    event_loop: &mut EventLoop<CalloopData>,
+    event_loop: &EventLoop<CalloopData>,
     data: &mut CalloopData,
 ) -> Result<(), Box<dyn std::error::Error>> {
     let display = &mut data.display;