hive-sh4re: delete now_unix(), the migration's last call sites are gone

hive-sh4re/src/wire_time.rs

@@ -15,17 +15,13 @@ pub fn from_secs(secs: i64) -> DateTime<Utc> {
     DateTime::<Utc>::from_timestamp(secs, 0).unwrap_or_default()
 }
 
-/// Current unix timestamp in seconds — the single definition behind
-/// every store's `created_at` / `sent_at` / … stamp (this module owns
-/// the epoch-seconds convention; a dozen local copies of this fn used
-/// to float around both binaries). Uses chrono's `clock` feature
-/// (already pulled in workspace-wide) instead of hand-rolled
-/// `SystemTime` math, consistent with every other timestamp in this
-/// module being a `chrono` type.
-#[must_use]
-pub fn now_unix() -> i64 {
-    Utc::now().timestamp()
-}
+// `now_unix()` (a hand-rolled-`SystemTime`-math-turned-`chrono` helper
+// that every store used to call for its `created_at` / `sent_at` / …
+// stamps) has been removed — every call site now uses
+// `chrono::Utc::now()` directly, either as a `DateTime<Utc>` struct
+// field or via `.timestamp()` for the ephemeral i64-typed (sqlite
+// bind / cutoff arithmetic) call sites. hivectl's own separate
+// `now_unix()` copy in `dag_progress.rs` is unrelated and untouched.
 
 #[cfg(test)]
 mod tests {