Example implementation: Add `TODO()` with a hint to remove stale sample code

CHANGELOG.md

@@ -6,6 +6,7 @@
 ### Added
 - Use JVM toolchain for configuring source/target compilation compatibility
 - Make sure GitHub Actions release jobs have write permissions
+- Example implementation: Add `TODO()` with a hint to remove stale sample code
 
 ### Changed
 - Dependencies - upgrade `org.jetbrains.kotlin.jvm` to `1.6.21`

src/main/kotlin/org/jetbrains/plugins/template/listeners/MyProjectManagerListener.kt

@@ -9,5 +9,7 @@ internal class MyProjectManagerListener : ProjectManagerListener {
 
     override fun projectOpened(project: Project) {
         project.service<MyProjectService>()
+
+        TODO("Don't forget to remove all non-needed sample code files with their corresponding registration entries in `plugin.xml`.")
     }
 }

src/main/kotlin/org/jetbrains/plugins/template/services/MyApplicationService.kt

@@ -6,5 +6,7 @@ class MyApplicationService {
 
     init {
         println(MyBundle.message("applicationService"))
+
+        TODO("Don't forget to remove all non-needed sample code files with their corresponding registration entries in `plugin.xml`.")
     }
 }

src/main/kotlin/org/jetbrains/plugins/template/services/MyProjectService.kt

@@ -7,5 +7,7 @@ class MyProjectService(project: Project) {
 
     init {
         println(MyBundle.message("projectService", project.name))
+
+        TODO("Don't forget to remove all non-needed sample code files with their corresponding registration entries in `plugin.xml`.")
     }
 }