change env_logger init

src/main.rs

@@ -1,14 +1,11 @@
 use std::{env, fs::read_to_string};
 
 use day1::day1;
-use log::LevelFilter;
 
 pub mod day1;
 
 fn main() {
-    env_logger::Builder::from_default_env()
-        .filter_level(LevelFilter::Debug)
-        .init();
+    env_logger::init();
 
     let args: Vec<String> = env::args().collect();