diff --git a/library/core/src/const_closure.rs b/library/core/src/const_closure.rs
index 6ea94c95473..d2e80e8e7e5 100644
--- a/library/core/src/const_closure.rs
+++ b/library/core/src/const_closure.rs
@@ -1,56 +1,5 @@
 use crate::marker::Destruct;
 
-/// Struct representing a closure with owned data.
-///
-/// Example:
-/// ```no_build
-/// use crate::const_closure::ConstFnOnceClosure;
-/// const fn imp(state: i32, (arg,): (i32,)) -> i32 {
-///     state + arg
-/// }
-/// let i = 5;
-/// let cl = ConstFnOnceClosure::new(i, imp);
-///
-/// assert!(7 == cl(2));
-/// ```
-pub(crate) struct ConstFnOnceClosure<CapturedData, Function> {
-    data: CapturedData,
-    func: Function,
-}
-
-impl<CapturedData, Function> ConstFnOnceClosure<CapturedData, Function> {
-    /// Function for creating a new closure.
-    ///
-    /// `data` is the owned data that is captured from the environment (this data must be `~const Destruct`).
-    ///
-    /// `func` is the function of the closure, it gets the data and a tuple of the arguments closure
-    ///   and return the return value of the closure.
-    #[allow(dead_code)]
-    pub(crate) const fn new<ClosureArguments, ClosureReturnValue>(
-        data: CapturedData,
-        func: Function,
-    ) -> Self
-    where
-        CapturedData: ~const Destruct,
-        Function: ~const Fn(CapturedData, ClosureArguments) -> ClosureReturnValue + ~const Destruct,
-    {
-        Self { data, func }
-    }
-}
-
-impl<CapturedData, ClosureArguments, Function> const FnOnce<ClosureArguments>
-    for ConstFnOnceClosure<CapturedData, Function>
-where
-    CapturedData: ~const Destruct,
-    Function: ~const Fn<(CapturedData, ClosureArguments)> + ~const Destruct,
-{
-    type Output = Function::Output;
-
-    extern "rust-call" fn call_once(self, args: ClosureArguments) -> Self::Output {
-        (self.func)(self.data, args)
-    }
-}
-
 /// Struct representing a closure with mutably borrowed data.
 ///
 /// Example:
@@ -112,77 +61,3 @@ where
         (self.func)(self.data, args)
     }
 }
-
-/// Struct representing a closure with borrowed data.
-///
-/// Example:
-/// ```no_build
-/// use crate::const_closure::ConstFnClosure;
-///
-/// const fn imp(state: &i32, (arg,): (i32,)) -> i32 {
-///     *state + arg
-/// }
-/// let i = 5;
-/// let cl = ConstFnClosure::new(&i, imp);
-///
-/// assert!(7 == cl(2));
-/// assert!(6 == cl(1));
-/// ```
-pub(crate) struct ConstFnClosure<'a, CapturedData: ?Sized, Function> {
-    data: &'a CapturedData,
-    func: Function,
-}
-
-impl<'a, CapturedData: ?Sized, Function> ConstFnClosure<'a, CapturedData, Function> {
-    /// Function for creating a new closure.
-    ///
-    /// `data` is the a mutable borrow of data that is captured from the environment.
-    ///
-    /// `func` is the function of the closure, it gets the data and a tuple of the arguments closure
-    ///   and return the return value of the closure.
-    #[allow(dead_code)]
-    pub(crate) const fn new<ClosureArguments, ClosureReturnValue>(
-        data: &'a CapturedData,
-        func: Function,
-    ) -> Self
-    where
-        Function: ~const Fn(&CapturedData, ClosureArguments) -> ClosureReturnValue,
-    {
-        Self { data, func }
-    }
-}
-
-impl<'a, CapturedData: ?Sized, Function, ClosureArguments, ClosureReturnValue> const
-    FnOnce<ClosureArguments> for ConstFnClosure<'a, CapturedData, Function>
-where
-    Function: ~const Fn(&CapturedData, ClosureArguments) -> ClosureReturnValue + ~const Destruct,
-{
-    type Output = ClosureReturnValue;
-
-    extern "rust-call" fn call_once(mut self, args: ClosureArguments) -> Self::Output {
-        self.call_mut(args)
-    }
-}
-
-impl<'a, CapturedData: ?Sized, Function, ClosureArguments, ClosureReturnValue> const
-    FnMut<ClosureArguments> for ConstFnClosure<'a, CapturedData, Function>
-where
-    Function: ~const Fn(&CapturedData, ClosureArguments) -> ClosureReturnValue,
-{
-    extern "rust-call" fn call_mut(&mut self, args: ClosureArguments) -> Self::Output {
-        self.call(args)
-    }
-}
-
-impl<
-    'a,
-    CapturedData: ?Sized,
-    Function: ~const Fn(&CapturedData, ClosureArguments) -> ClosureReturnValue,
-    ClosureArguments,
-    ClosureReturnValue,
-> const Fn<ClosureArguments> for ConstFnClosure<'a, CapturedData, Function>
-{
-    extern "rust-call" fn call(&self, args: ClosureArguments) -> Self::Output {
-        (self.func)(self.data, args)
-    }
-}