Remove unused dependency spring-boot-starter-jdbc

Author: jgrandja

samples/default-authorizationserver/samples-default-authorizationserver.gradle

@@ -16,7 +16,6 @@ repositories {
 dependencies {
 	implementation "org.springframework.boot:spring-boot-starter-web"
 	implementation "org.springframework.boot:spring-boot-starter-security"
-	implementation "org.springframework.boot:spring-boot-starter-jdbc"
 	implementation project(":spring-security-oauth2-authorization-server")
 	runtimeOnly "com.h2database:h2"