refactor: reduce Iterator methods usage

src/lib.rs

@@ -38,16 +38,14 @@ impl<const L: usize> UsbBus for UsbDevice<L> {
 
                 // If ep_aadr not provided, or current endpoint is allocated, try to find next free endpoint, otherwise return UsbError. //
                 _ => {
-                    let index = self
-                        .ep_table
+                    let index = self.ep_table[1..]
                         .iter()
                         .enumerate()
-                        .skip(1)
                         .find(|(index, ep)| {
                             !ep.is_allocated && max_packet_size <= ENDPOINTS_ALLOC_LAYOUT[*index]
                         })
-                        .ok_or(UsbError::EndpointOverflow)?
-                        .0;
+                        .map(|(index, _)| index)
+                        .ok_or(UsbError::EndpointOverflow)?;
 
                     EndpointAddress::from_parts(index, ep_dir)
                 }