Use std::sync::OnceLock instead of once_cell.

Cargo.toml

@@ -31,9 +31,6 @@ wasi = { version = "0.11", default-features = false }
 [target.'cfg(all(windows, not(target_vendor = "win7")))'.dependencies]
 windows-targets = "0.52"
 
-[target.'cfg(any(target_os = "aix", target_os = "android", target_os = "haiku", target_os = "linux", target_os = "nto", target_os = "redox"))'.dependencies]
-once_cell = { version = "1.19.0", default-features = false, features = ["std"]}
-
 [target.'cfg(all(any(target_arch = "wasm32", target_arch = "wasm64"), target_os = "unknown"))'.dependencies]
 wasm-bindgen = { version = "0.2.62", default-features = false, optional = true }
 js-sys = { version = "0.3", optional = true }

src/lib.rs

@@ -205,6 +205,7 @@
     html_favicon_url = "https://www.rust-lang.org/favicon.ico",
     html_root_url = "https://docs.rs/getrandom/0.2.15"
 )]
+#![feature(once_cell_try)]
 #![no_std]
 #![warn(rust_2018_idioms, unused_lifetimes, missing_docs)]
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]

src/use_file.rs

@@ -4,9 +4,7 @@ extern crate std;
 
 use crate::{util_libc::sys_fill_exact, Error};
 use core::{ffi::c_void, mem::MaybeUninit};
-use std::{fs::File, io, os::unix::io::AsRawFd as _};
-// TODO(MSRV feature(once_cell_try)): Use std::sync::OnceLock instead.
-use once_cell::sync::OnceCell as OnceLock;
+use std::{fs::File, io, os::unix::io::AsRawFd as _, sync::OnceLock};
 
 /// For all platforms, we use `/dev/urandom` rather than `/dev/random`.
 /// For more information see the linked man pages in lib.rs.