diff --git a/ext/io/12_io.js b/ext/io/12_io.js
index 0621e64794..36cde6020d 100644
--- a/ext/io/12_io.js
+++ b/ext/io/12_io.js
@@ -13,7 +13,6 @@ import {
 const {
   Uint8Array,
   ArrayPrototypePush,
-  MathMin,
   TypedArrayPrototypeSubarray,
   TypedArrayPrototypeSet,
   TypedArrayPrototypeGetBuffer,
@@ -171,56 +170,6 @@ function concatBuffers(buffers) {
   return contents;
 }
 
-function readAllSyncSized(r, size) {
-  const buf = new Uint8Array(size + 1); // 1B to detect extended files
-  let cursor = 0;
-
-  while (cursor < size) {
-    const sliceEnd = MathMin(size + 1, cursor + READ_PER_ITER);
-    const slice = TypedArrayPrototypeSubarray(buf, cursor, sliceEnd);
-    const read = r.readSync(slice);
-    if (typeof read == "number") {
-      cursor += read;
-    } else {
-      break;
-    }
-  }
-
-  // Handle truncated or extended files during read
-  if (cursor > size) {
-    // Read remaining and concat
-    return concatBuffers([buf, readAllSync(r)]);
-  } else { // cursor == size
-    return TypedArrayPrototypeSubarray(buf, 0, cursor);
-  }
-}
-
-async function readAllInnerSized(r, size, options) {
-  const buf = new Uint8Array(size + 1); // 1B to detect extended files
-  let cursor = 0;
-  const signal = options?.signal ?? null;
-  while (cursor < size) {
-    signal?.throwIfAborted();
-    const sliceEnd = MathMin(size + 1, cursor + READ_PER_ITER);
-    const slice = TypedArrayPrototypeSubarray(buf, cursor, sliceEnd);
-    const read = await r.read(slice);
-    if (typeof read == "number") {
-      cursor += read;
-    } else {
-      break;
-    }
-  }
-  signal?.throwIfAborted();
-
-  // Handle truncated or extended files during read
-  if (cursor > size) {
-    // Read remaining and concat
-    return concatBuffers([buf, await readAllInner(r, options)]);
-  } else {
-    return TypedArrayPrototypeSubarray(buf, 0, cursor);
-  }
-}
-
 class Stdin {
   #readable;
 
@@ -327,9 +276,7 @@ export {
   read,
   readAll,
   readAllInner,
-  readAllInnerSized,
   readAllSync,
-  readAllSyncSized,
   readSync,
   SeekMode,
   stderr,