Revert "Add sql transactions"

This caused the error "locked database".
This reverts commit 9823511b62.

src/main.rs

@@ -28,11 +28,11 @@ async fn main() -> Result<(), std::io::Error> {
 
 	let pool = emgauwa_common::db::init(&settings.database).await?;
 
-	let mut tx = pool.begin().await.map_err(EmgauwaError::from)?;
-	DbController::all_inactive(&mut tx)
+	let mut conn = pool.acquire().await.map_err(EmgauwaError::from)?;
+	DbController::all_inactive(&mut conn)
 		.await
 		.map_err(EmgauwaError::from)?;
-	tx.commit().await.map_err(EmgauwaError::from)?;
+	conn.close().await.map_err(EmgauwaError::from)?;
 
 	let app_state_arbiter = Arbiter::with_tokio_rt(|| {
 		tokio::runtime::Builder::new_multi_thread()