don't clone master of DataFlow on travis

users will generally be on release versions

.travis.yml

@@ -8,7 +8,6 @@ julia:
 # uncomment the following lines to override the default test script
 script:
   - if [[ -a .git/shallow ]]; then git fetch --unshallow; fi
-  - julia -e 'Pkg.clone("https://github.com/MikeInnes/DataFlow.jl")'
   - julia -e 'Pkg.clone(pwd()); Pkg.build("Flux"); Pkg.test("Flux"; coverage=true)'
 after_success:
   # - julia -e 'Pkg.add("Documenter")'