Drop the start-up pass that folds files WordPress listed twice (#83)

Before 0.6.0 the parser took WordPress's numbered player URLs (?_=2) for
separate files and downloaded some episodes twice. Since then it drops
the repeats while reading (same_file_key), and merge_repeated_enclosures
cleaned up what was already stored. Production has run it; on every
start since it has only cost a query that finds nothing.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main.rs

@@ -422,21 +422,6 @@ async fn daemon(
         Err(e) => tracing::warn!(error = ?e, "could not retire feeds whose OPML is no longer in config"),
     }
 
-    // Before the parser knew WordPress's numbered player URLs, a file it listed twice was
-    // downloaded twice. The repeats fold into the first, and their spare copies are deleted.
-    match ctx.db.merge_repeated_enclosures(feed::same_file_key).await {
-        Ok((0, _)) => {}
-        Ok((n, spare)) => {
-            for path in &spare {
-                if let Err(e) = std::fs::remove_file(path) {
-                    tracing::warn!(path, error = %e, "could not delete a spare copy");
-                }
-            }
-            tracing::info!(enclosures = n, files = spare.len(), "folded files WordPress listed twice");
-        }
-        Err(e) => tracing::warn!(error = ?e, "could not fold files WordPress listed twice"),
-    }
-
     let (tx_cmd, mut rx_cmd) = mpsc::channel::<Cmd>(64);
 
     let web = start_web(&ctx, &config_path, web_addr, &tx_cmd, &events).await?;