chore: remove unused module (#2102)

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

data_types/src/write_buffer.rs

@@ -1,17 +0,0 @@
-use chrono::{DateTime, Utc};
-use serde::{Deserialize, Serialize};
-
-/// The persistence metadata associated with a given segment
-#[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq)]
-pub struct SegmentPersistence {
-    pub location: String,
-    pub time: DateTime<Utc>,
-}
-
-/// The summary information for a segment
-#[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq)]
-pub struct SegmentSummary {
-    pub size: u64,
-    pub created_at: DateTime<Utc>,
-    pub persisted: Option<SegmentPersistence>,
-}