warning: methods `should_notify` and `notify` are never used
  --> src/bot/vc_diff/mod.rs:49:14
   |
41 | impl VcDiffBot {
   | -------------- methods in this implementation
...
49 |     async fn should_notify(&self) -> bool {
   |              ^^^^^^^^^^^^^
...
65 |     async fn notify(&self, ctx: &dyn Context, user_id: u64, joined: bool) -> Result<()> {
   |              ^^^^^^

warning: static `TIMEOUT` is never used
  --> src/bot/vc_diff/mod.rs:39:8
   |
39 | static TIMEOUT: Lazy<Duration> = Lazy::new(|| Duration::seconds(1));
   |        ^^^^^^^

warning: field `timeout` is never read
  --> src/bot/vc_diff/mod.rs:36:5
   |
34 | pub(crate) struct VcDiffBot {
   |                   --------- field in this struct
35 |     enabled: Mutex<bool>,
36 |     timeout: Mutex<DateTime<Utc>>,
   |     ^^^^^^^

warning: function `default_formula` is never used
  --> src/bot/genkai_point/formula/mod.rs:17:15
   |
17 | pub(crate) fn default_formula() -> impl GenkaiPointFormula {
   |               ^^^^^^^^^^^^^^^

warning: static `RESUME_MSG_TIMEOUT` is never used
   --> src/bot/genkai_point/mod.rs:180:8
    |
180 | static RESUME_MSG_TIMEOUT: Lazy<Duration> = Lazy::new(|| Duration::seconds(10));
    |        ^^^^^^^^^^^^^^^^^^

warning: field `resume_msg_timeout` is never read
   --> src/bot/genkai_point/mod.rs:175:5
    |
173 | pub(crate) struct GenkaiPointBot<D, P> {
    |                   -------------- field in this struct
174 |     db: D,
175 |     resume_msg_timeout: Mutex<DateTime<Utc>>,
    |     ^^^^^^^^^^^^^^^^^^

warning: enum `CreateNewSessionResult` is never used
   --> src/bot/genkai_point/mod.rs:167:17
    |
167 | pub(crate) enum CreateNewSessionResult {
    |                 ^^^^^^^^^^^^^^^^^^^^^^

warning: methods `create_new_session`, `unclosed_session_exists`, `close_session`, and `get_all_users_who_has_unclosed_session` are never used
   --> src/bot/genkai_point/mod.rs:127:14
    |
123 | pub(crate) trait GenkaiPointDatabase: Send + Sync {
    |                  ------------------- methods in this trait
...
127 |     async fn create_new_session(
    |              ^^^^^^^^^^^^^^^^^^
...
132 |     async fn unclosed_session_exists(&self, user_id: u64) -> Result<bool>;
    |              ^^^^^^^^^^^^^^^^^^^^^^^
133 |     async fn close_session(&self, user_id: u64, left_at: DateTime<Utc>) -> Result<()>;
    |              ^^^^^^^^^^^^^
134 |     async fn get_users_all_sessions(&self, user_id: u64) -> Result<Vec<Session>>;
135 |     async fn get_all_users_who_has_unclosed_session(&self) -> Result<Vec<u64>>;
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

warning: methods `on_vc_data_available`, `on_vc_join`, and `on_vc_leave` are never used
   --> src/bot/mod.rs:86:14
    |
78  | pub(crate) trait BotService: Send + Sync {
    |                  ---------- methods in this trait
...
86  |     async fn on_vc_data_available(
    |              ^^^^^^^^^^^^^^^^^^^^
...
95  |     async fn on_vc_join(&self, _ctx: &dyn Context, _user_id: u64) -> Result<()> {
    |              ^^^^^^^^^^
...
100 |     async fn on_vc_leave(&self, _ctx: &dyn Context, _user_id: u64) -> Result<()> {
    |              ^^^^^^^^^^^
    |
    = note: `#[warn(dead_code)]` on by default