Temporarily revert git panel diff editor feature (#22733)

The existing code was causing us to constantly re-scan files when
anything changed in the project. Temporarily revert this as we're about
to rework this entire UI with the new primitives.

follow up to https://github.com/zed-industries/zed/pull/22329

Release Notes:

- N/A

---------

Co-authored-by: Cole <cole@zed.dev>

crates/project/src/lsp_store.rs

@@ -3108,7 +3108,6 @@ impl LspStore {
             WorktreeStoreEvent::WorktreeUpdateSent(worktree) => {
                 worktree.update(cx, |worktree, _cx| self.send_diagnostic_summaries(worktree));
             }
-            WorktreeStoreEvent::GitRepositoryUpdated => {}
         }
     }
 

crates/project/src/project.rs

@@ -244,7 +244,6 @@ pub enum Event {
     ActivateProjectPanel,
     WorktreeAdded(WorktreeId),
     WorktreeOrderChanged,
-    GitRepositoryUpdated,
     WorktreeRemoved(WorktreeId),
     WorktreeUpdatedEntries(WorktreeId, UpdatedEntriesSet),
     WorktreeUpdatedGitRepositories(WorktreeId),
@@ -2307,7 +2306,6 @@ impl Project {
             }
             WorktreeStoreEvent::WorktreeOrderChanged => cx.emit(Event::WorktreeOrderChanged),
             WorktreeStoreEvent::WorktreeUpdateSent(_) => {}
-            WorktreeStoreEvent::GitRepositoryUpdated => cx.emit(Event::GitRepositoryUpdated),
         }
     }
 

crates/project/src/worktree_store.rs

@@ -62,7 +62,6 @@ pub enum WorktreeStoreEvent {
     WorktreeReleased(EntityId, WorktreeId),
     WorktreeOrderChanged,
     WorktreeUpdateSent(Model<Worktree>),
-    GitRepositoryUpdated,
 }
 
 impl EventEmitter<WorktreeStoreEvent> for WorktreeStore {}
@@ -376,17 +375,6 @@ impl WorktreeStore {
             this.send_project_updates(cx);
         })
         .detach();
-
-        cx.subscribe(
-            worktree,
-            |_this, _, event: &worktree::Event, cx| match event {
-                worktree::Event::UpdatedGitRepositories(_) => {
-                    cx.emit(WorktreeStoreEvent::GitRepositoryUpdated);
-                }
-                worktree::Event::DeletedEntry(_) | worktree::Event::UpdatedEntries(_) => {}
-            },
-        )
-        .detach();
     }
 
     pub fn remove_worktree(&mut self, id_to_remove: WorktreeId, cx: &mut ModelContext<Self>) {