replace /prompts with a rotating placeholder (#2314)

codex-rs/tui/src/slash_command.rs

@@ -18,7 +18,6 @@ pub enum SlashCommand {
     Diff,
     Mention,
     Status,
-    Prompts,
     Logout,
     Quit,
     #[cfg(debug_assertions)]
@@ -36,7 +35,6 @@ impl SlashCommand {
             SlashCommand::Diff => "show git diff (including untracked files)",
             SlashCommand::Mention => "mention a file",
             SlashCommand::Status => "show current session configuration and token usage",
-            SlashCommand::Prompts => "show example prompts",
             SlashCommand::Logout => "log out of Codex",
             #[cfg(debug_assertions)]
             SlashCommand::TestApproval => "test approval request",