remove unused import

Author: oech3

src/uu/cat/src/splice.rs

@@ -4,7 +4,6 @@
 // file that was distributed with this source code.
 use super::{CatResult, FdReadable, InputHandle};
 
-use std::io::Write;
 use std::os::{fd::AsFd, unix::io::AsRawFd};
 
 use uucore::pipes::{MAX_ROOTLESS_PIPE_SIZE, might_fuse, splice};
@@ -17,7 +16,7 @@ use uucore::pipes::{MAX_ROOTLESS_PIPE_SIZE, might_fuse, splice};
 /// The `bool` in the result value indicates if we need to fall back to normal
 /// copying or not. False means we don't have to.
 #[inline]
-pub(super) fn write_fast_using_splice<R: FdReadable, S: AsRawFd + AsFd + Write>(
+pub(super) fn write_fast_using_splice<R: FdReadable, S: AsRawFd + AsFd>(
     handle: &InputHandle<R>,
     write_fd: &mut S,
 ) -> CatResult<bool> {

src/uucore/src/lib/features/pipes.rs

@@ -97,7 +97,7 @@ pub fn might_fuse(source: &impl AsFd) -> bool {
 pub fn splice_unbounded<R, S>(source: &R, dest: &mut S) -> std::io::Result<bool>
 where
     R: Read + AsFd,
-    S: AsFd + Write,
+    S: AsFd,
 {
     // improve throughput
     // todo: avoid fcntl overhead for small input, but don't fcntl inside of the loop
@@ -123,7 +123,7 @@ where
 pub fn splice_unbounded_broker<R, S>(source: &R, dest: &mut S) -> std::io::Result<bool>
 where
     R: Read + AsFd,
-    S: AsFd + Write,
+    S: AsFd,
 {
     static PIPE_CACHE: OnceLock<Option<(File, File)>> = OnceLock::new();
     let Some((pipe_rd, pipe_wr)) = PIPE_CACHE.get_or_init(|| pipe().ok()).as_ref() else {