"Remove py36-sqlite,py38-sqlite from CI [SKIP CI]."

.drone.yml

@@ -1,44 +1,4 @@
 kind: pipeline
-name: py37-sqlite
-
-steps:
-    - name: tox
-      image: python:3.7
-      pull: if-not-exists
-      environment:
-        CFLAGS: -O0
-        DB_CACHE: /cache
-        TOX_TESTENV_PASSENV: CFLAGS DB_CACHE
-      commands:
-        - pip install tox
-        - tox -e "py37-sqlite"
-      volumes:
-        - name: cache
-          path: /root/.cache
-
-    - name: notify
-      image: drillster/drone-email
-      pull: if-not-exists
-      settings:
-        from: drone@datalifeit.es
-        skip_verify: true
-        host:
-          from_secret: email_host
-        port:
-          from_secret: email_port
-      when:
-        status:
-        - changed
-        - failure
-
-volumes:
-    - name: cache
-      host:
-        path: /var/lib/cache
-
-
----
-kind: pipeline
 name: py38-sqlite
 
 steps: