remove once_cell as dependency

our MSVR at least 1.71.0, and once_cell was merge into std in 1.70.0,
so there are no reason to use external one instead of std

Cargo.toml

@@ -17,7 +17,6 @@ default = ["regex"]
 regex = ["env_filter/regex"]
 
 [dependencies]
-once_cell = "1.9"
 env_filter = "0.1.0"
 env_logger = "0.11.2"
 

src/lib.rs

@@ -65,7 +65,6 @@
 
 #[cfg(target_os = "android")]
 extern crate android_log_sys as log_ffi;
-use once_cell::sync::OnceCell;
 
 use log::{Level, LevelFilter, Log, Metadata, Record};
 #[cfg(target_os = "android")]
@@ -74,6 +73,7 @@ use std::ffi::{CStr, CString};
 use std::fmt;
 use std::mem::{self, MaybeUninit};
 use std::ptr;
+use std::sync::OnceLock;
 
 pub use env_filter::{Builder as FilterBuilder, Filter};
 pub use env_logger::fmt::Formatter;
@@ -162,14 +162,14 @@ fn android_log(_buf_id: Option<LogId>, _priority: Level, _tag: &CStr, _msg: &CSt
 
 /// Underlying android logger backend
 pub struct AndroidLogger {
-    config: OnceCell<Config>,
+    config: OnceLock<Config>,
 }
 
 impl AndroidLogger {
     /// Create new logger instance from config
     pub fn new(config: Config) -> AndroidLogger {
         AndroidLogger {
-            config: OnceCell::from(config),
+            config: OnceLock::from(config),
         }
     }
 
@@ -178,7 +178,7 @@ impl AndroidLogger {
     }
 }
 
-static ANDROID_LOGGER: OnceCell<AndroidLogger> = OnceCell::new();
+static ANDROID_LOGGER: OnceLock<AndroidLogger> = OnceLock::new();
 
 const LOGGING_TAG_MAX_LEN: usize = 23;
 const LOGGING_MSG_MAX_LEN: usize = 4000;
@@ -187,7 +187,7 @@ impl Default for AndroidLogger {
     /// Create a new logger with default config
     fn default() -> AndroidLogger {
         AndroidLogger {
-            config: OnceCell::from(Config::default()),
+            config: OnceLock::from(Config::default()),
         }
     }
 }