Simplify configuration

config/resources/application.yaml

@@ -1,6 +1,5 @@
 db:
     jdbc-url: jdbc:h2:./notes-db;
-    driver-class-name: org.h2.Driver
     username: h2
     password: ''
     connection-timeout: 3000

config/src/Config.kt

@@ -7,14 +7,13 @@ import java.util.concurrent.TimeUnit
 @ConfigurationProperties("db")
 data class DataSourceConfig @ConfigurationInject constructor(
     val jdbcUrl: String,
-    val driverClassName: String,
     val username: String,
     val password: String,
     val maximumPoolSize: Int,
     val connectionTimeout: Long,
 ) {
-    override fun toString() = "DataSourceConfig(jdbcUrl='$jdbcUrl', driverClassName='$driverClassName', " +
-        "username='$username', password='***', maximumPoolSize=$maximumPoolSize, connectionTimeout=$connectionTimeout)"
+    override fun toString() = "DataSourceConfig(jdbcUrl='$jdbcUrl', username='$username', password='***', " +
+        "maximumPoolSize=$maximumPoolSize, connectionTimeout=$connectionTimeout)"
 }
 
 @ConfigurationProperties("jwt")