Process.send docs: remove Named Subjects section

As of c54cb6e it's no longer correct;
the new behaviour on sending to a named subject with no registered
process is described by the 'Panics' section below

Author: kadei-rat

src/gleam/erlang/process.gleam

@@ -183,11 +183,6 @@ fn raw_send(a: Pid, b: message) -> DoNotLeak
 /// This function does not wait for the `Subject` owner process to call the
 /// `receive` function, instead it returns once the message has been placed in
 /// the process' mailbox.
-/// 
-/// # Named Subjects
-/// 
-/// If this function is called on a named subject for which a process has not been 
-/// registered, it will simply drop the message as there's no mailbox to send it to.
 ///
 /// # Panics
 ///