message: add log-message when deleting crates
diff: @@ -7,7 +7,7 @@ use crate::{Config, Index, Metrics, RustwideBuilder};
  use anyhow::Context;
  use crates_index_diff::Change;
  -use log::debug;
  +use log::{debug, info};
  use std::fs;
  use std::path::PathBuf;
  @@ -257,6 +257,10 @@ impl BuildQueue {
  }
  Change::Deleted(krate) => {
  + info!(
  + "crate {} was deleted from the index and will be deleted from the database",
  + krate
  + );
  delete_crate(&mut conn, &self.storage, &self.config, krate)
  .with_context(|| format!("failed to delete crate {}", krate))?;
  }
  