Remove programmatic Logback configuration documentation

Closes gh-1533

Author: sdeleuze

spring-native-docs/src/main/asciidoc/support.adoc

@@ -151,7 +151,6 @@ implementation("org.springframework.boot:spring-boot-starter-actuator") {
 *** Configuration with embedded `logback.xml` https://github.com/spring-projects-experimental/spring-native/issues/625[is not supported yet].
 *** Configuration with embedded `logback-spring.xml`, via `myapp -Dlogging.config=logback-config.xml` or `myapp --logging.config=logback-config.xml` is supported but you need to enable <<aot-build-setup-configuration, XML support>> and add https://search.maven.org/artifact/org.codehaus.janino/janino[`org.codehaus.janino:janino` dependency] (see the `logger` sample).
 *** http://logback.qos.ch/manual/configuration.html#conditional[Conditional processing in Logback] configuration with Janino library has limited support. Only simple expressions of `isDefined()` and `isNull()` having string literal as argument are supported.
-*** See <<logback-workaround, this workaround>> to configure it programmatically.
 ** Log4j2 is not supported yet, see https://github.com/spring-projects-experimental/spring-native/issues/115[#115].
 * `spring-boot-starter-mail`
 * `spring-boot-starter-oauth2-resource-server`: WebMvc and WebFlux are supported.

spring-native-docs/src/main/asciidoc/troubleshooting.adoc

@@ -75,47 +75,6 @@ You should add resource configuration using <<native-hints>>.
 Because of a temporary limitation of the AOT plugin, developers need to trigger the `package` phase if they wish to run the application with the Spring Boot Maven plugin:
 please use `mvn package spring-boot:run`.
 
-[[logback-workaround]]
-==== How can I configure programmatically Logback as a `logback.xml` alternative?
-
-As a workaround for https://github.com/spring-projects-experimental/spring-native/issues/625[#625], you can create a `src/main/resources/META-INF/services/ch.qos.logback.classic.spi.Configurator` file with the following content:
-
-[source,subs="attributes,verbatim"]
-----
-org.springframework.boot.logging.logback.CustomConfigurator
-----
-
-Add a `org.springframework.boot.logging.logback.CustomConfigurator` class similar to the one bellow which will disable Spring Boot logging configuration override, reuse Spring Boot defaults, and allow you to customize Logback `LoggerContext`:
-
-[source,java,subs="attributes,verbatim"]
-----
-public class CustomConfigurator extends ContextAwareBase implements Configurator {
-
-	@Override
-	public void configure(LoggerContext context) {
-
-		// Set this to avoid LoggerContext override by Spring Boot
-		context.putObject(LoggingSystem.class.getName(), new Object());
-
-		// Apply Spring Boot default configuration, make sure CustomConfigurator
-		// is in the org.springframework.boot.logging.logback package
-		LogbackConfigurator configurator = new LogbackConfigurator(context);
-		new DefaultLogbackConfiguration(null).apply(configurator);
-		context.setPackagingDataEnabled(true);
-
-		// Your custom configuration goes there
-		context.addListener(...);
-	}
-}
-----
-
-Add also the following hint to your Spring Boot application class:
-
-[source,java,subs="attributes,verbatim"]
-----
-@InitializationHint(types = ColorConverter.class, initTime = InitializationTime.BUILD)
-----
-
 ==== Missing configuration
 
 The Spring AOT plugin will do the best it can to catch everything but it doesn't understand every bit of code out there.