remove documentation for gc

pyo3-macros/src/lib.rs

@@ -86,12 +86,11 @@ pub fn pyproto(_: TokenStream, input: TokenStream) -> TokenStream {
 /// |  Parameter  |  Description |
 /// | :-  | :- |
 /// | <span style="white-space: pre">`name = "python_name"`</span> | Sets the name that Python sees this class as. Defaults to the name of the Rust struct. |
-/// | <span style="white-space: pre">`freelist = N`</span> |  Implements a [free list][10] of size N. This can improve performance for types that are often created and deleted in quick succession. Profile your code to see whether `freelist` is right for you.  |
-/// | `gc`  | Participate in Python's [garbage collection][5]. Required if your type contains references to other Python objects. If you don't (or incorrectly) implement this, contained Python objects may be hidden from Python's garbage collector and you may leak memory. Note that leaking memory, while undesirable, [is safe behavior][7].|
+/// | <span style="white-space: pre">`freelist = N`</span> |  Implements a [free list][9] of size N. This can improve performance for types that are often created and deleted in quick succession. Profile your code to see whether `freelist` is right for you.  |
 /// | `weakref` | Allows this class to be [weakly referenceable][6]. |
 /// | <span style="white-space: pre">`extends = BaseType`</span>  | Use a custom baseclass. Defaults to [`PyAny`][4] |
 /// | `subclass` | Allows other Python classes and `#[pyclass]` to inherit from this class. Enums cannot be subclassed. |
-/// | `unsendable` | Required if your struct is not [`Send`][3]. Rather than using `unsendable`, consider implementing your struct in a threadsafe way by e.g. substituting [`Rc`][8] with [`Arc`][9]. By using `unsendable`, your class will panic when accessed by another thread.|
+/// | `unsendable` | Required if your struct is not [`Send`][3]. Rather than using `unsendable`, consider implementing your struct in a threadsafe way by e.g. substituting [`Rc`][7] with [`Arc`][8]. By using `unsendable`, your class will panic when accessed by another thread.|
 /// | <span style="white-space: pre">`module = "module_name"`</span> |  Python code will see the class as being defined in this module. Defaults to `builtins`. |
 ///
 /// For more on creating Python classes,
@@ -103,10 +102,9 @@ pub fn pyproto(_: TokenStream, input: TokenStream) -> TokenStream {
 /// [4]: ../prelude/struct.PyAny.html
 /// [5]: https://pyo3.rs/latest/class/protocols.html#garbage-collector-integration
 /// [6]: https://docs.python.org/3/library/weakref.html
-/// [7]: https://doc.rust-lang.org/nomicon/leaking.html
-/// [8]: std::rc::Rc
-/// [9]: std::sync::Arc
-/// [10]: https://en.wikipedia.org/wiki/Free_list
+/// [7]: std::rc::Rc
+/// [8]: std::sync::Arc
+/// [9]: https://en.wikipedia.org/wiki/Free_list
 #[proc_macro_attribute]
 pub fn pyclass(attr: TokenStream, input: TokenStream) -> TokenStream {
     use syn::Item;