Remove Pkg.checkout from CI config

Author: tkf

.travis.yml

@@ -65,7 +65,6 @@ before_script:
   - which ${PYTHON:-python}
 script:
   - julia -e 'Pkg.add("PyCall")'
-  - julia -e 'Pkg.checkout("PyCall"); Pkg.build("PyCall")'
   - /usr/bin/python --version
   - PYTHON=${PYTHON:-python}
   - echo $PYTHON

appveyor.yml

@@ -70,7 +70,7 @@ build_script:
   # - C:\projects\julia\bin\julia -e "versioninfo(); Pkg.add(\"PyCall\"); Pkg.init(); Pkg.resolve()"
   # - C:\projects\julia\bin\julia -e "using PyCall; @assert isdefined(:PyCall); @assert typeof(PyCall) === Module"
   - "SET PYTHON=%PYTHONDIR%\\python.exe"
-  - C:\projects\julia\bin\julia -e "versioninfo(); Pkg.add(\"PyCall\"); Pkg.checkout(\"PyCall\"); Pkg.build(\"PyCall\")"
+  - C:\projects\julia\bin\julia -e "versioninfo(); Pkg.add(\"PyCall\")"
 
 test_script:
   - "SET PATH=%PYTHONDIR%;%PYTHONDIR%\\Scripts;C:\\projects\\julia\\bin;%PATH%"