Use logger warn instead of `TODO()`

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

@@ -6,9 +6,6 @@ import com.intellij.openapi.diagnostic.thisLogger
 internal class MyFrameStateListener : FrameStateListener {
 
     override fun onFrameActivated() {
-        thisLogger().info("Frame activated")
-
-        System.getenv("CI")
-            ?: TODO("Don't forget to remove all non-needed sample code files with their corresponding registration entries in `plugin.xml`.")
+        thisLogger().warn("Don't forget to remove all non-needed sample code files with their corresponding registration entries in `plugin.xml`.")
     }
 }