fix: beta doc lints in task pool

I chose to remove the extended documentation for `TaskPool::executor`. It references `TaskPoolInner` which was added in bevyengine#384 when `bevy_tasks` was first created, but that struct was later removed in bevyengine#2250. James may be able to rewrite the comment, but I do not know enough about the task pool to write anything.

crates/bevy_tasks/src/task_pool.rs

@@ -37,7 +37,7 @@ pub struct TaskPoolBuilder {
     /// If set, we'll use the given stack size rather than the system default
     stack_size: Option<usize>,
     /// Allows customizing the name of the threads - helpful for debugging. If set, threads will
-    /// be named <thread_name> (<thread_index>), i.e. "MyThreadPool (2)"
+    /// be named `<thread_name> (<thread_index>)`, i.e. `"MyThreadPool (2)"`.
     thread_name: Option<String>,
 
     on_thread_spawn: Option<Arc<dyn Fn() + Send + Sync + 'static>>,
@@ -106,14 +106,10 @@ impl TaskPoolBuilder {
 /// will still execute a task, even if it is dropped.
 #[derive(Debug)]
 pub struct TaskPool {
-    /// The executor for the pool
-    ///
-    /// This has to be separate from TaskPoolInner because we have to create an `Arc<Executor>` to
-    /// pass into the worker threads, and we must create the worker threads before we can create
-    /// the `Vec<Task<T>>` contained within `TaskPoolInner`
+    /// The executor for the pool.
     executor: Arc<async_executor::Executor<'static>>,
 
-    /// Inner state of the pool
+    // The inner state of the pool.
     threads: Vec<JoinHandle<()>>,
     shutdown_tx: async_channel::Sender<()>,
 }