[travis] Remove go get for vet
diff --git a/.travis.yml b/.travis.yml
index 3165f00..295f0c3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,7 +6,6 @@
   - go build -v ./...
 
   # linting
-  - go get golang.org/x/tools/cmd/vet
   - go get github.com/golang/lint
   - go install github.com/golang/lint/golint