LRC-LIB-FOLDERS: drop an unused import (#947 follow-up)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BKWB9TCnvzJHV6xMLAj2J4

crates/engine/src/rename.rs

@@ -431,7 +431,6 @@ fn move_across_volumes(fs: &RealFs, a: &Path, b: &Path) -> std::io::Result<()> {
 /// Whether files `a` and `b` hold the same bytes: lengths first, then 1 MiB chunks at a time, so
 /// a large raw or video is never read into memory whole.
 fn same_contents(a: &Path, b: &Path) -> std::io::Result<bool> {
-    use std::io::Read;
     const CHUNK: usize = 1 << 20;
     let (mut fa, mut fb) = (std::fs::File::open(a)?, std::fs::File::open(b)?);
     if fa.metadata()?.len() != fb.metadata()?.len() {