chore: fix clippy warning

Author: xi xiao

src/main.rs

@@ -1,7 +1,7 @@
 use sf_afmt::args::{get_args, Args};
 use sf_afmt::format;
 use sf_afmt::formatter::Formatter;
-use std::time::Instant;
+//use std::time::Instant;
 use std::{fs, process};
 
 fn main() {