controllers/krate/delete: remove the temporary language from rust-lang#10591

Closes rust-lang#10538.

Author: LawnGnome

app/templates/crate/delete.hbs

@@ -21,13 +21,7 @@
     <div local-class="requirements">
       <h3>Requirements:</h3>
       <p>
-        A crate can only be deleted if it is not depended upon by any other crate on crates.io. (This is a temporary
-        restriction due to
-        <a
-          href='https://github.com/rust-lang/crates.io/issues/10538'
-          target='_blank'
-          rel='noopener noreferrer'
-        >#10538</a>.)
+        A crate can only be deleted if it is not depended upon by any other crate on crates.io.
       </p>
       <p>Additionally, a crate can only be deleted if either:</p>
       <ol local-class='first'>

src/controllers/krate/delete.rs

@@ -99,8 +99,7 @@ pub async fn delete_crate(
         }
     }
 
-    // Temporary hack to mitigate https://github.com/rust-lang/crates.io/issues/10538: all crates
-    // with reverse dependencies are currently blocked from being deleted to avoid unexpected
+    // All crates with reverse dependencies are blocked from being deleted to avoid unexpected
     // historical index changes.
     if has_rev_dep(&mut conn, krate.id).await? {
         let msg = "only crates without reverse dependencies can be deleted";