Remove .a files from artifacts.

.gitlab-ci.yml

@@ -17,6 +17,7 @@ build:
         - cmake --build build/coverage -j$(nproc)
     after_script:
         - find . -name "*.o" -type f -delete
+        - find . -name "*.a" -type f -delete
     artifacts:
         paths:
             - build/coverage