Remove unused macro_use

src/macros.rs

@@ -12,7 +12,6 @@ macro_rules! net_log {
 }
 
 #[cfg(not(any(feature = "log", feature = "defmt")))]
-#[macro_use]
 macro_rules! net_log {
     ($level:ident, $($arg:expr),*) => { $( let _ = $arg; )* }
 }