Update .travis.yml

remove `make blobfuse` in `build test` since it's not necessary

Author: andyzhangx

.travis.yml

@@ -18,7 +18,6 @@ jobs:
         - go get github.com/golang/dep/cmd/dep
       script:
         - hack/verify-all.sh
-        - make blobfuse
         - make blobfuse-container
         - make blobfuse-windows
         - go test -covermode=count -coverprofile=profile.cov ./pkg/...