Fix travis docs job

.travis.yml

@@ -1,38 +1,38 @@
 # Documentation: http://docs.travis-ci.com/user/languages/julia/
 language: julia
+
 os:
   - linux
   - osx
   - windows
-arch:
-  - x64
-  # - x86
+
 julia:
   - 1.3
   - 1
   - nightly
+
 branches:
   only:
   - master
   - gh-pages # For building documentation
   - /^testing-.*$/ # testing branches
   - /^v[0-9]+\.[0-9]+\.[0-9]+$/ # version tags
+
 jobs:
+  allow_failures:
+    - julia: nightly
   include:
     - stage: "Documentation"
       julia: 1
       os: linux
       script:
-        - julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate(); Pkg.build("Arrow")'
+        - julia --project=docs/ -e 'using Pkg; Pkg.instantiate()'
         - julia --project=docs/ docs/make.jl
       after_success: skip
-matrix:
-  exclude:
-    - os: osx
-      arch: x86
-  allow_failures:
-  - julia: nightly
+
+
 notifications:
   email: false
+
 after_success:
    - julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage; Codecov.submit(Codecov.process_folder())'