remove remaining dead code left over from /dev endpoints

db::ensure_dev_athlete was never called (main.rs had its own,
inferior copy, removed in the previous commit). Config::dev_sync_days
and Config::require_api_key were only used by the now-removed
/dev/sync handlers.

src/config.rs

@@ -16,8 +16,6 @@ pub struct Config {
     pub intervals_webhook_secret: Option<String>,
 
     pub cookie_secure: bool,
-
-    pub dev_sync_days: i64,
 }
 
 impl Config {
@@ -50,15 +48,6 @@ impl Config {
             .parse::<bool>()
             .context("COOKIE_SECURE must be true or false")?;
 
-        let dev_sync_days = env::var("DEV_SYNC_DAYS")
-            .unwrap_or_else(|_| "30".to_string())
-            .parse::<i64>()
-            .context("DEV_SYNC_DAYS must be an integer")?;
-
-        if dev_sync_days <= 0 {
-            anyhow::bail!("DEV_SYNC_DAYS must be greater than zero");
-        }
-
         Ok(Self {
             database_url,
             bind_address,
@@ -73,16 +62,8 @@ impl Config {
             intervals_webhook_secret,
 
             cookie_secure,
-
-            dev_sync_days,
         })
     }
-
-    pub fn require_api_key(&self) -> Result<&str> {
-        self.intervals_api_key
-            .as_deref()
-            .context("INTERVALS_API_KEY is not configured")
-    }
 }
 
 fn required(name: &str) -> Result<String> {

src/db.rs

@@ -158,40 +158,6 @@ pub async fn delete_old_oauth_states(db: &PgPool) -> Result<()> {
     Ok(())
 }
 
-pub async fn ensure_dev_athlete(
-    db: &PgPool,
-    intervals_athlete_id: &str,
-    display_name: &str,
-    api_key: &str,
-) -> Result<i64> {
-    let row = sqlx::query(
-        r#"
-        INSERT INTO athletes (
-            intervals_athlete_id,
-            display_name,
-            access_token,
-            scopes
-        )
-        VALUES ($1, $2, $3, 'dev')
-        ON CONFLICT (intervals_athlete_id)
-        DO UPDATE SET
-            display_name = EXCLUDED.display_name,
-            access_token = EXCLUDED.access_token,
-            updated_at = now()
-        RETURNING id
-        "#,
-    )
-    .bind(intervals_athlete_id)
-    .bind(display_name)
-    .bind(api_key)
-    .fetch_one(db)
-    .await?;
-
-    use sqlx::Row;
-
-    Ok(row.try_get("id")?)
-}
-
 /// Create or update an athlete authenticated with a personal API key.
 pub async fn upsert_api_key_athlete(
     db: &PgPool,