Stop testing against nightly

The tests will continue to fail until JuliaLang/julia#23351 is fixed,
and it doesn't seem like that will happen anytime soon.

Author: simonster

.travis.yml

@@ -4,7 +4,6 @@ os:
   - osx
 julia:
   - 0.6
-  - nightly
 notifications:
   email: false
 script:

appveyor.yml

@@ -2,8 +2,6 @@ environment:
   matrix:
   - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x86/0.6/julia-0.6-latest-win32.exe"
   - JULIA_URL: "https://julialang-s3.julialang.org/bin/winnt/x64/0.6/julia-0.6-latest-win64.exe"
-  - JULIA_URL: "https://julialangnightlies-s3.julialang.org/bin/winnt/x86/julia-latest-win32.exe"
-  - JULIA_URL: "https://julialangnightlies-s3.julialang.org/bin/winnt/x64/julia-latest-win64.exe"
 
 branches:
   only: