Revert "feat(desktop): Terminal Splits (#8767)"

This reverts commit 88fd6a294b.

packages/opencode/src/pty/index.ts

@@ -146,10 +146,6 @@ export namespace Pty {
     ptyProcess.onExit(({ exitCode }) => {
       log.info("session exited", { id, exitCode })
       session.info.status = "exited"
-      for (const ws of session.subscribers) {
-        ws.close()
-      }
-      session.subscribers.clear()
       Bus.publish(Event.Exited, { id, exitCode })
       state().delete(id)
     })