Remove the ESP-IDF special case as the assessment was wrong and it is not necessary

Author: ivmarkov

src/reactor.rs

@@ -14,17 +14,9 @@ use libc as sys;
 
 use crate::{syscall, syscall_los, syscall_los_eagain};
 
-// For ESP-IDF sys::FDSETSIZE is currently wrongly set to 1024 in the `libc` crate
-// Therefore, use a custom value for now
-#[cfg(target_os = "espidf")]
-const MAX_FDS: usize = 64;
-
-#[cfg(not(target_os = "espidf"))]
-const MAX_FDS: usize = sys::FD_SETSIZE;
-
 // In future, we might want to use a smaller - and possibly - configurable - with cargo feature(s)
 // amount of registrations to save memory, but for now, let's use the maximum amount
-const MAX_REGISTRATIONS: usize = MAX_FDS;
+const MAX_REGISTRATIONS: usize = sys::FD_SETSIZE;
 
 #[derive(EnumSetType, Debug)]
 pub(crate) enum Event {
@@ -114,7 +106,7 @@ impl<const N: usize> Registrations<N> {
             Err(ErrorKind::InvalidInput)?;
         }
 
-        if fd >= MAX_FDS as RawFd {
+        if fd >= sys::FD_SETSIZE as RawFd {
             Err(ErrorKind::InvalidInput)?;
         }