Omit worktree id when emitting Event::DiskBasedDiagnosticsUpdated

Sometimes we will have more than one worktree associated with the same
language server and in that case it's unclear which worktree id we should
report an event for.

crates/diagnostics/src/items.rs

@@ -19,7 +19,7 @@ impl DiagnosticSummary {
         cx: &mut ViewContext<Self>,
     ) -> Self {
         cx.subscribe(project, |this, project, event, cx| match event {
-            project::Event::DiskBasedDiagnosticsUpdated { .. } => {
+            project::Event::DiskBasedDiagnosticsUpdated => {
                 this.summary = project.read(cx).diagnostic_summary(cx);
                 cx.notify();
             }