Revert "Auto merge of #93893 - oli-obk:sad_revert, r=oli-obk"

This reverts commit 6499c5e7fc, reversing
changes made to 78450d2d60.

compiler/rustc_data_structures/src/vec_map.rs

@@ -30,6 +30,11 @@ where
         }
     }
 
+    /// Removes the entry from the map and returns the removed value
+    pub fn remove(&mut self, k: &K) -> Option<V> {
+        self.0.iter().position(|(k2, _)| k2 == k).map(|pos| self.0.remove(pos).1)
+    }
+
     /// Gets a reference to the value in the entry.
     pub fn get<Q: ?Sized>(&self, k: &Q) -> Option<&V>
     where
@@ -39,6 +44,15 @@ where
         self.0.iter().find(|(key, _)| k == key.borrow()).map(|elem| &elem.1)
     }
 
+    /// Gets a mutable reference to the value in the entry.
+    pub fn get_mut<Q: ?Sized>(&mut self, k: &Q) -> Option<&mut V>
+    where
+        K: Borrow<Q>,
+        Q: Eq,
+    {
+        self.0.iter_mut().find(|(key, _)| k == key.borrow()).map(|elem| &mut elem.1)
+    }
+
     /// Returns the any value corresponding to the supplied predicate filter.
     ///
     /// The supplied predicate will be applied to each (key, value) pair and it will return a
@@ -58,7 +72,7 @@ where
         // This should return just one element, otherwise it's a bug
         assert!(
             filter.next().is_none(),
-            "Collection {:?} should have just one matching element",
+            "Collection {:#?} should have just one matching element",
             self
         );
         Some(value)