1 files changed, 0 insertions, 75 deletions
diff --git a/third_party/rust/indexmap/src/mutable_keys.rs b/third_party/rust/indexmap/src/mutable_keys.rs
deleted file mode 100644
index 35a90c4723..0000000000
--- a/third_party/rust/indexmap/src/mutable_keys.rs
+++ /dev/null
@@ -1,75 +0,0 @@
-use core::hash::{BuildHasher, Hash};
-
-use super::{Equivalent, IndexMap};
-
-pub struct PrivateMarker {}
-
-/// Opt-in mutable access to keys.
-///
-/// These methods expose `&mut K`, mutable references to the key as it is stored
-/// in the map.
-/// You are allowed to modify the keys in the hashmap **if the modification
-/// does not change the key’s hash and equality**.
-///
-/// If keys are modified erroneously, you can no longer look them up.
-/// This is sound (memory safe) but a logical error hazard (just like
-/// implementing PartialEq, Eq, or Hash incorrectly would be).
-///
-/// `use` this trait to enable its methods for `IndexMap`.
-pub trait MutableKeys {
-    type Key;
-    type Value;
-
-    /// Return item index, mutable reference to key and value
-    fn get_full_mut2<Q: ?Sized>(
-        &mut self,
-        key: &Q,
-    ) -> Option<(usize, &mut Self::Key, &mut Self::Value)>
-    where
-        Q: Hash + Equivalent<Self::Key>;
-
-    /// Scan through each key-value pair in the map and keep those where the
-    /// closure `keep` returns `true`.
-    ///
-    /// The elements are visited in order, and remaining elements keep their
-    /// order.
-    ///
-    /// Computes in **O(n)** time (average).
-    fn retain2<F>(&mut self, keep: F)
-    where
-        F: FnMut(&mut Self::Key, &mut Self::Value) -> bool;
-
-    /// This method is not useful in itself – it is there to “seal” the trait
-    /// for external implementation, so that we can add methods without
-    /// causing breaking changes.
-    fn __private_marker(&self) -> PrivateMarker;
-}
-
-/// Opt-in mutable access to keys.
-///
-/// See [`MutableKeys`](trait.MutableKeys.html) for more information.
-impl<K, V, S> MutableKeys for IndexMap<K, V, S>
-where
-    K: Eq + Hash,
-    S: BuildHasher,
-{
-    type Key = K;
-    type Value = V;
-    fn get_full_mut2<Q: ?Sized>(&mut self, key: &Q) -> Option<(usize, &mut K, &mut V)>
-    where
-        Q: Hash + Equivalent<K>,
-    {
-        self.get_full_mut2_impl(key)
-    }
-
-    fn retain2<F>(&mut self, keep: F)
-    where
-        F: FnMut(&mut K, &mut V) -> bool,
-    {
-        self.retain_mut(keep)
-    }
-
-    fn __private_marker(&self) -> PrivateMarker {
-        PrivateMarker {}
-    }
-}