chore: remove unnecessary trait

noir-projects/aztec-nr/aztec/src/unencrypted_logs/unencrypted_event_emission.nr

@@ -1,16 +1,14 @@
 use crate::{context::PublicContext, event::event_interface::EventInterface};
 use dep::protocol_types::traits::Serialize;
 
-fn emit<Event, let N: u32, let M: u32>(context: &mut PublicContext, event: Event)
+fn emit<Event, let N: u32>(context: &mut PublicContext, event: Event)
 where
-    Event: EventInterface<N>,
-    Event: Serialize<N>,
-    [Field; N]: LensForEventSelector<N, M>,
+    Event: EventInterface<N> + Serialize<N>,
 {
     let selector = Event::get_event_type_id();
 
     let serialized_event = event.serialize();
-    let mut emitted_log = [0; M];
+    let mut emitted_log = [0; N + 1];
 
     // We put the selector in the "last" place, to avoid reading or assigning to an expression in an index
     for i in 0..serialized_event.len() {
@@ -22,50 +20,11 @@ where
     context.emit_unencrypted_log(emitted_log);
 }
 
-pub fn encode_event<Event, let N: u32, let M: u32>(
+pub fn encode_event<Event, let N: u32>(
     context: &mut PublicContext,
 ) -> fn[(&mut PublicContext,)](Event) -> ()
 where
-    Event: EventInterface<N>,
-    Event: Serialize<N>,
-    [Field; N]: LensForEventSelector<N, M>,
+    Event: EventInterface<N> + Serialize<N>,
 {
     |e: Event| { emit(context, e); }
 }
-
-trait LensForEventSelector<let N: u32, let M: u32> {
-    // N = event preimage input in fields
-    // M = event preimage input in fields + event selector as field
-    fn output(self: [Field; N]) -> [Field; M];
-}
-
-impl LensForEventSelector<1, 2> for [Field; 1] {
-    fn output(self) -> [Field; 2] {
-        [self[0] as Field; 2]
-    }
-}
-impl LensForEventSelector<2, 3> for [Field; 2] {
-    fn output(self) -> [Field; 3] {
-        [self[0] as Field; 3]
-    }
-}
-impl LensForEventSelector<3, 4> for [Field; 3] {
-    fn output(self) -> [Field; 4] {
-        [self[0] as Field; 4]
-    }
-}
-impl LensForEventSelector<4, 5> for [Field; 4] {
-    fn output(self) -> [Field; 5] {
-        [self[0] as Field; 5]
-    }
-}
-impl LensForEventSelector<5, 6> for [Field; 5] {
-    fn output(self) -> [Field; 6] {
-        [self[0] as Field; 6]
-    }
-}
-impl LensForEventSelector<6, 7> for [Field; 6] {
-    fn output(self) -> [Field; 7] {
-        [self[0] as Field; 7]
-    }
-}