ci: simplify

.drone.yml

@@ -4,21 +4,6 @@ name: default
 steps:
 - name: test
   image: golang
-  volumes:
-  - name: deps
-    path: /go
   commands:
   - go get ./...
   - go test -v ./...
-
-- name: build
-  image: golang
-  volumes:
-  - name: deps
-    path: /go
-  commands:
-  - GO111MODULE=on go build
-
-volumes:
-- name: deps
-  temp: {}