Revert "Make IntoPyObject for Bound & Borrowed more generic (#5831)"

This reverts commit ee66c21.

Author: Icxolu

newsfragments/5831.added.md

@@ -127,55 +127,55 @@ pub(crate) mod private {
     }
 }
 
-impl<'py, T: PyTypeCheck> IntoPyObject<'py> for Bound<'_, T> {
+impl<'py, T: PyTypeCheck> IntoPyObject<'py> for Bound<'py, T> {
     type Target = T;
     type Output = Bound<'py, Self::Target>;
     type Error = Infallible;
 
     #[cfg(feature = "experimental-inspect")]
     const OUTPUT_TYPE: PyStaticExpr = T::TYPE_HINT;
 
-    fn into_pyobject(self, py: Python<'py>) -> Result<Self::Output, Self::Error> {
-        Ok(self.unbind().into_bound(py))
+    fn into_pyobject(self, _py: Python<'py>) -> Result<Self::Output, Self::Error> {
+        Ok(self)
     }
 }
 
-impl<'a, 'py, T: PyTypeCheck> IntoPyObject<'py> for &'a Bound<'_, T> {
+impl<'a, 'py, T: PyTypeCheck> IntoPyObject<'py> for &'a Bound<'py, T> {
     type Target = T;
     type Output = Borrowed<'a, 'py, Self::Target>;
     type Error = Infallible;
 
     #[cfg(feature = "experimental-inspect")]
     const OUTPUT_TYPE: PyStaticExpr = T::TYPE_HINT;
 
-    fn into_pyobject(self, py: Python<'py>) -> Result<Self::Output, Self::Error> {
-        Ok(self.as_unbound().bind_borrowed(py))
+    fn into_pyobject(self, _py: Python<'py>) -> Result<Self::Output, Self::Error> {
+        Ok(self.as_borrowed())
     }
 }
 
-impl<'a, 'py, T: PyTypeCheck> IntoPyObject<'py> for Borrowed<'a, '_, T> {
+impl<'a, 'py, T: PyTypeCheck> IntoPyObject<'py> for Borrowed<'a, 'py, T> {
     type Target = T;
     type Output = Borrowed<'a, 'py, Self::Target>;
     type Error = Infallible;
 
     #[cfg(feature = "experimental-inspect")]
     const OUTPUT_TYPE: PyStaticExpr = T::TYPE_HINT;
 
-    fn into_pyobject(self, py: Python<'py>) -> Result<Self::Output, Self::Error> {
-        Ok(self.as_unbound().bind_borrowed(py))
+    fn into_pyobject(self, _py: Python<'py>) -> Result<Self::Output, Self::Error> {
+        Ok(self)
     }
 }
 
-impl<'a, 'py, T: PyTypeCheck> IntoPyObject<'py> for &Borrowed<'a, '_, T> {
+impl<'a, 'py, T: PyTypeCheck> IntoPyObject<'py> for &Borrowed<'a, 'py, T> {
     type Target = T;
     type Output = Borrowed<'a, 'py, Self::Target>;
     type Error = Infallible;
 
     #[cfg(feature = "experimental-inspect")]
     const OUTPUT_TYPE: PyStaticExpr = T::TYPE_HINT;
 
-    fn into_pyobject(self, py: Python<'py>) -> Result<Self::Output, Self::Error> {
-        Ok(self.as_unbound().bind_borrowed(py))
+    fn into_pyobject(self, _py: Python<'py>) -> Result<Self::Output, Self::Error> {
+        Ok(*self)
     }
 }
 

newsfragments/5831.changed.md

@@ -1075,14 +1075,6 @@ impl<'a, 'py, T> Borrowed<'a, 'py, T> {
     pub unsafe fn cast_unchecked<U>(self) -> Borrowed<'a, 'py, U> {
         Borrowed(self.0, PhantomData, self.2)
     }
-
-    /// Removes the connection for this `Borrowed<T>` from the [`Python<'py>`] token,
-    /// allowing it to cross thread boundaries, without transferring ownership.
-    #[inline]
-    pub fn as_unbound(&self) -> &'a Py<T> {
-        // Safety: NonNull<ffi::PyObject> is layout-compatible with Py<T>
-        unsafe { NonNull::from(&self.0).cast().as_ref() }
-    }
 }
 
 impl<'a, T: PyClass> Borrowed<'a, '_, T> {