diff --git a/crates/polars-mem-engine/src/executors/scan/mod.rs b/crates/polars-mem-engine/src/executors/scan/mod.rs
index 1f50268db23f..93d86da8cb57 100644
--- a/crates/polars-mem-engine/src/executors/scan/mod.rs
+++ b/crates/polars-mem-engine/src/executors/scan/mod.rs
@@ -7,8 +7,6 @@ mod ndjson;
 #[cfg(feature = "parquet")]
 mod parquet;
 
-#[cfg(feature = "ipc")]
-mod support;
 use std::mem;
 
 #[cfg(feature = "csv")]
diff --git a/crates/polars-mem-engine/src/executors/scan/support.rs b/crates/polars-mem-engine/src/executors/scan/support.rs
deleted file mode 100644
index 97342e02a91b..000000000000
--- a/crates/polars-mem-engine/src/executors/scan/support.rs
+++ /dev/null
@@ -1,55 +0,0 @@
-use polars_utils::IdxSize;
-
-// Tracks the sum of consecutive values in a dynamically sized array where the values can be written
-// in any order.
-pub struct ConsecutiveCountState {
-    counts: Box<[IdxSize]>,
-    next_index: usize,
-    sum: IdxSize,
-}
-
-impl ConsecutiveCountState {
-    pub fn new(len: usize) -> Self {
-        Self {
-            counts: vec![IdxSize::MAX; len].into_boxed_slice(),
-            next_index: 0,
-            sum: 0,
-        }
-    }
-
-    /// Sum of all consecutive counts.
-    pub fn sum(&self) -> IdxSize {
-        self.sum
-    }
-
-    /// Write count at index.
-    pub fn write(&mut self, index: usize, count: IdxSize) {
-        debug_assert!(
-            self.counts[index] == IdxSize::MAX,
-            "second write to same index"
-        );
-        debug_assert!(count != IdxSize::MAX, "count can not be IdxSize::MAX");
-
-        self.counts[index] = count;
-
-        // Update sum and next index.
-        while self.next_index < self.counts.len() {
-            let count = self.counts[self.next_index];
-            if count == IdxSize::MAX {
-                break;
-            }
-            self.sum += count;
-            self.next_index += 1;
-        }
-    }
-
-    pub fn len(&self) -> usize {
-        self.counts.len()
-    }
-
-    pub fn counts(&self) -> impl Iterator<Item = Option<IdxSize>> + '_ {
-        self.counts
-            .iter()
-            .map(|&count| (count != IdxSize::MAX).then_some(count))
-    }
-}