fixing ci

.gitlab-ci.yml

@@ -8,7 +8,7 @@ build-docs:
   image: python
   before_script:
     - apt-get -y update
-    - apt-get install -y cmake libarrow-dev
+    - apt-get install -y cmake
     - pip install -r docs/requirements.txt
     - pip install tox pyarrow
     - pip install .