CI: Labeler: Don't label Kotlin for changenotes

They get labeled as Java. Given we aren't labeling shared QLL changes,
it makes sense not to label shared changenotes either.

Author: igfoo

.github/labeler.yml

@@ -22,7 +22,6 @@ Kotlin:
   - java/kotlin-extractor/**/*
   - java/kotlin-explorer/**/*
   - java/ql/test/kotlin/**/*
-  - change-notes/**/*java.*
 
 Python:
   - python/**/*