Remove WeakId TryFrom impl

Author: madsmtm

crates/objc2/CHANGELOG.md

@@ -98,6 +98,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
   let obj: Id<NSObject> = unsafe { msg_send_id![NSObject::class(), new] };
   ```
+* **BREAKING**: Removed `impl<T> TryFrom<WeakId<T>> for Id<T>` impl since it
+  did not have a proper error type, making it less useful than just using
+  `WeakId::load`.
 
 
 ## 0.3.0-beta.5 - 2023-02-07

crates/objc2/src/rc/weak_id.rs

@@ -186,13 +186,6 @@ impl<T: IsIdCloneable> From<Id<T>> for WeakId<T> {
     }
 }
 
-impl<T: IsRetainable> TryFrom<WeakId<T>> for Id<T> {
-    type Error = ();
-    fn try_from(weak: WeakId<T>) -> Result<Self, ()> {
-        weak.load().ok_or(())
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use core::mem;