1 files changed, 0 insertions, 74 deletions
diff --git a/components/style/rule_tree/unsafe_box.rs b/components/style/rule_tree/unsafe_box.rs
deleted file mode 100644
index eaa441d7b25..00000000000
--- a/components/style/rule_tree/unsafe_box.rs
+++ /dev/null
@@ -1,74 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
-
-#![allow(unsafe_code)]
-
-use std::mem::ManuallyDrop;
-use std::ops::Deref;
-use std::ptr;
-
-/// An unsafe box, derefs to `T`.
-pub(super) struct UnsafeBox<T> {
-    inner: ManuallyDrop<Box<T>>,
-}
-
-impl<T> UnsafeBox<T> {
-    /// Creates a new unsafe box.
-    pub(super) fn from_box(value: Box<T>) -> Self {
-        Self {
-            inner: ManuallyDrop::new(value),
-        }
-    }
-
-    /// Creates a new box from a pointer.
-    ///
-    /// # Safety
-    ///
-    /// The input should point to a valid `T`.
-    pub(super) unsafe fn from_raw(ptr: *mut T) -> Self {
-        Self {
-            inner: ManuallyDrop::new(Box::from_raw(ptr)),
-        }
-    }
-
-    /// Creates a new unsafe box from an existing one.
-    ///
-    /// # Safety
-    ///
-    /// There is no refcounting or whatever else in an unsafe box, so this
-    /// operation can lead to double frees.
-    pub(super) unsafe fn clone(this: &Self) -> Self {
-        Self {
-            inner: ptr::read(&this.inner),
-        }
-    }
-
-    /// Returns a mutable reference to the inner value of this unsafe box.
-    ///
-    /// # Safety
-    ///
-    /// Given `Self::clone`, nothing prevents anyone from creating
-    /// multiple mutable references to the inner value, which is completely UB.
-    pub(crate) unsafe fn deref_mut(this: &mut Self) -> &mut T {
-        &mut this.inner
-    }
-
-    /// Drops the inner value of this unsafe box.
-    ///
-    /// # Safety
-    ///
-    /// Given this doesn't consume the unsafe box itself, this has the same
-    /// safety caveats as `ManuallyDrop::drop`.
-    pub(super) unsafe fn drop(this: &mut Self) {
-        ManuallyDrop::drop(&mut this.inner)
-    }
-}
-
-impl<T> Deref for UnsafeBox<T> {
-    type Target = T;
-
-    fn deref(&self) -> &Self::Target {
-        &self.inner
-    }
-}