Manually remove directory contents.

- Maybe there is something cached?

.gitlab-ci.yml

@@ -9,9 +9,12 @@ test:
   stage: build
   before_script:
     - git submodule init
-    - git submodule update --remote
     - cat .gitmodules
     - cat .git/config
     - ls -lah *
+    - rm -rf relast.preprocessor/*
+    - ls -lah *
+    - git submodule update --remote
+    - ls -lah *
   script:
     - ./gradlew --no-daemon build