Update appveyor.yml

Author: ChrisRackauckas

appveyor.yml

@@ -1,15 +1,8 @@
 environment:
   matrix:
-  - JULIAVERSION: "julialang/bin/winnt/x86/0.6/julia-0.6-latest-win32.exe"
-  - JULIAVERSION: "julialang/bin/winnt/x64/0.6/julia-0.6-latest-win64.exe"
   - JULIAVERSION: "julianightlies/bin/winnt/x86/julia-latest-win32.exe"
   - JULIAVERSION: "julianightlies/bin/winnt/x64/julia-latest-win64.exe"
 
-matrix:
-  allow_failures:
-    - JULIAVERSION: "julianightlies/bin/winnt/x86/julia-latest-win32.exe"
-    - JULIAVERSION: "julianightlies/bin/winnt/x64/julia-latest-win64.exe"
-
 branches:
   only:
     - master