Remove indentation and top-level this stanza

[ci skip]

.drone.yml

@@ -9,11 +9,6 @@ steps:
       force: true
       ssh_key:
         from_secret: drone_deploy_key
-    trigger:
+trigger:
-      branch:
+  branch:
-        - master
+    - master
-      event:
-        include:
-          - push
-        exclude:
-          - pull_request