Fix deleting crates to only remove owner relationships when deleting an entire crate

Author: Nemo157

src/db/delete.rs

@@ -51,7 +51,6 @@ fn get_id(conn: &Connection, name: &str) -> Result<i32, Error> {
 // WARNING: these must be hard-coded and NEVER user input.
 const METADATA: [(&str, &str); 5] = [
     ("author_rels", "rid"),
-    ("owner_rels", "cid"),
     ("keyword_rels", "rid"),
     ("builds", "rid"),
     ("compression_rels", "release"),
@@ -105,6 +104,7 @@ fn delete_crate_from_database(conn: &Connection, name: &str, crate_id: i32) -> R
             &[&crate_id],
         )?;
     }
+    transaction.execute("DELETE FROM owner_rels WHERE cid = $1;", &[&crate_id])?;
     transaction.execute("DELETE FROM releases WHERE crate_id = $1;", &[&crate_id])?;
     transaction.execute("DELETE FROM crates WHERE id = $1;", &[&crate_id])?;