remove redundant things from database config

bot/src/main/kotlin/dev/inmo/plagubot/config/DatabaseConfig.kt

@@ -12,29 +12,15 @@ data class DatabaseConfig(
     val url: String = "jdbc:sqlite:file:test?mode=memory&cache=shared",
     val driver: String = JDBC::class.qualifiedName!!,
     val username: String = "",
-    val password: String = "",
-    val initAutomatically: Boolean = true
+    val password: String = ""
 ) {
     @Transient
-    private lateinit var _database: Database
-    val database: Database
-        get() = try {
-            _database
-        } catch (e: UninitializedPropertyAccessException) {
-            Database.connect(
+    val database: Database = Database.connect(
         url,
         driver,
         username,
         password
     ).also {
-                _database = it
         it.transactionManager.defaultIsolationLevel = Connection.TRANSACTION_SERIALIZABLE // Or Connection.TRANSACTION_READ_UNCOMMITTED
     }
 }
-
-    init {
-        if (initAutomatically) {
-            database // init database
-        }
-    }
-}