Fixed dangling files in windows build

.gitlab-ci.yml

@@ -53,6 +53,9 @@ build-windows:
   script:
     - docker run --rm -v "$(pwd):/src/" cdrx/pyinstaller-windows:python3 "pip install -r requirements-dev.txt && pyinstaller --clean -y cli.spec --distpath ."
     - docker run --rm -v "$(pwd):/src/" cdrx/pyinstaller-windows:python3 "echo 'Testing the generated CLI works…' && (wine ./funkwhale.exe --help | grep uploads) && echo 'funkwhale CLI working \o/'"
+  after_script:
+    - py3clean .
+    - rm -rf build
   artifacts:
     name: "linux_${CI_COMMIT_REF_NAME}"
     paths: