Store shared buffers on LocalWorktree

It's okay for our domain objects to model remote state. We should minimize what we need to store in the rpc::ClientState struct.

zed/src/rpc.rs

@@ -1,5 +1,5 @@
 use super::util::SurfResultExt as _;
-use crate::{editor::Buffer, language::LanguageRegistry, worktree::Worktree};
+use crate::{language::LanguageRegistry, worktree::Worktree};
 use anyhow::{anyhow, Context, Result};
 use gpui::executor::Background;
 use gpui::{AsyncAppContext, ModelHandle, Task, WeakModelHandle};
@@ -29,22 +29,21 @@ pub struct Client {
 
 pub struct ClientState {
     connection_id: Option<ConnectionId>,
-    pub remote_worktrees: HashMap<u64, WeakModelHandle<Worktree>>,
-    pub shared_buffers: HashMap<PeerId, HashMap<u64, ModelHandle<Buffer>>>,
+    pub shared_worktrees: HashMap<u64, WeakModelHandle<Worktree>>,
     pub languages: Arc<LanguageRegistry>,
 }
 
 impl ClientState {
-    pub fn remote_worktree(
+    pub fn shared_worktree(
         &mut self,
         id: u64,
         cx: &mut AsyncAppContext,
     ) -> Result<ModelHandle<Worktree>> {
-        if let Some(worktree) = self.remote_worktrees.get(&id) {
+        if let Some(worktree) = self.shared_worktrees.get(&id) {
             if let Some(worktree) = cx.read(|cx| worktree.upgrade(cx)) {
                 Ok(worktree)
             } else {
-                self.remote_worktrees.remove(&id);
+                self.shared_worktrees.remove(&id);
                 Err(anyhow!("worktree {} was dropped", id))
             }
         } else {
@@ -59,8 +58,7 @@ impl Client {
             peer: Peer::new(),
             state: Arc::new(Mutex::new(ClientState {
                 connection_id: None,
-                remote_worktrees: Default::default(),
-                shared_buffers: Default::default(),
+                shared_worktrees: Default::default(),
                 languages,
             })),
         }