Remove a few unnecessary usages of Lazy (#3531)

* Convert usage of Lazy to OnceLock on macOS and iOS

* Remove a few uses of Lazy that wrapped Mutex or RwLock

The `new` functions on these were made `const` in Rust 1.63.0

* Use AtomicBool instead of RwLock

src/platform_impl/linux/mod.rs

@@ -647,8 +647,7 @@ pub(crate) enum PlatformCustomCursor {
 
 /// Hooks for X11 errors.
 #[cfg(x11_platform)]
-pub(crate) static mut XLIB_ERROR_HOOKS: Lazy<Mutex<Vec<XlibErrorHook>>> =
-    Lazy::new(|| Mutex::new(Vec::new()));
+pub(crate) static mut XLIB_ERROR_HOOKS: Mutex<Vec<XlibErrorHook>> = Mutex::new(Vec::new());
 
 #[cfg(x11_platform)]
 unsafe extern "C" fn x_error_callback(

src/platform_impl/linux/x11/ime/input_method.rs

@@ -8,10 +8,9 @@ use std::{
 };
 
 use super::{super::atoms::*, ffi, util, XConnection, XError};
-use crate::utils::Lazy;
 use x11rb::protocol::xproto;
 
-static GLOBAL_LOCK: Lazy<Mutex<()>> = Lazy::new(Default::default);
+static GLOBAL_LOCK: Mutex<()> = Mutex::new(());
 
 unsafe fn open_im(xconn: &Arc<XConnection>, locale_modifiers: &CStr) -> Option<ffi::XIM> {
     let _lock = GLOBAL_LOCK.lock();

src/platform_impl/linux/x11/util/wm.rs

@@ -1,7 +1,5 @@
 use std::sync::Mutex;
 
-use crate::utils::Lazy;
-
 use super::*;
 
 // https://specifications.freedesktop.org/wm-spec/latest/ar01s04.html#idm46075117309248
@@ -16,9 +14,8 @@ pub const MOVERESIZE_LEFT: isize = 7;
 pub const MOVERESIZE_MOVE: isize = 8;
 
 // This info is global to the window manager.
-static SUPPORTED_HINTS: Lazy<Mutex<Vec<xproto::Atom>>> =
-    Lazy::new(|| Mutex::new(Vec::with_capacity(0)));
-static WM_NAME: Lazy<Mutex<Option<String>>> = Lazy::new(|| Mutex::new(None));
+static SUPPORTED_HINTS: Mutex<Vec<xproto::Atom>> = Mutex::new(Vec::new());
+static WM_NAME: Mutex<Option<String>> = Mutex::new(None);
 
 pub fn hint_is_supported(hint: xproto::Atom) -> bool {
     (*SUPPORTED_HINTS.lock().unwrap()).contains(&hint)