--- a/utils/src/lib.rs
+++ b/utils/src/lib.rs
@@ -4,49 +4,3 @@ pub mod bitstream;
 pub mod lzss;
 pub mod math;
 pub mod prng;
-
-#[cfg(test)]
-use std::io;
-
-#[cfg(test)]
-pub struct SeekableSlice<'a> {
-    slice: &'a [u8],
-    cursor: usize,
-}
-
-#[cfg(test)]
-impl SeekableSlice<'_> {
-    pub fn new(slice: &[u8]) -> SeekableSlice {
-        SeekableSlice {
-            slice,
-            cursor: 0,
-        }
-    }
-}
-
-#[cfg(test)]
-impl io::Read for SeekableSlice<'_> {
-    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
-        let length = (&self.slice[self.cursor..]).read(buf)?;
-        self.cursor += length;
-        Ok(length)
-    }
-}
-
-#[cfg(test)]
-impl io::Seek for SeekableSlice<'_> {
-    fn seek(&mut self, seek_from: io::SeekFrom) -> io::Result<u64> {
-        match seek_from {
-            io::SeekFrom::Start(offset) => {
-                self.cursor = offset as usize;
-            }
-            io::SeekFrom::End(offset) => {
-                self.cursor = (self.slice.len() as i64 + offset) as usize;
-            }
-            io::SeekFrom::Current(offset) => {
-                self.cursor = (self.cursor as i64 + offset) as usize;
-            }
-        }
-        Ok(self.cursor as u64)
-    }
-}