Revert "Add DNS settings to ci"

This reverts commit d7a949da40.

.drone.yml

@@ -3,11 +3,6 @@
 kind: pipeline
 name: deployment
 
-pipeline:
-  docker:
-    image: plugins/docker
-    custom_dns: [ 1.1.1.1, 1.0.0.1 ]
-
 steps:
 - name: deploy
   image: appleboy/drone-ssh
@@ -29,11 +24,6 @@ trigger:
 kind: pipeline
 name: staging
 
-pipeline:
-  docker:
-    image: plugins/docker
-    custom_dns: [ 1.1.1.1, 1.0.0.1 ]
-
 steps:
 - name: stage
   image: appleboy/drone-ssh
@@ -57,11 +47,6 @@ trigger:
 kind: pipeline
 name: integration
 
-pipeline:
-  docker:
-    image: plugins/docker
-    custom_dns: [ 1.1.1.1, 1.0.0.1 ]
-
 steps:
 - name: build
   image: node