Remove .build.yml

I will just use GitHub Actions and Drone.

.build.yml

@@ -1,15 +0,0 @@
-image: archlinux
-packages:
-  - python-poetry
-sources:
-  - https://git.sr.ht/~alanorth/csv-metadata-quality
-tasks:
-  - setup: |
-      cd csv-metadata-quality
-      poetry install
-  - pytest: |
-      cd csv-metadata-quality
-      poetry run pytest
-  - testcli: |
-      cd csv-metadata-quality
-      poetry run csv-metadata-quality -i data/test.csv -o /tmp/test.csv -e -u --agrovoc-fields dc.subject,cg.coverage.country