remove win64 from vs2017
@@ -21,12 +21,12 @@ boost:
cxx_compiler:
- gxx # [linux]
- clang # [osx]
- - vs2017_win64 # [win]
+ - vs2017 # [win]
c_compiler:
- gcc # [linux]
- clang # [osx]
- - vs2017_win64 # [win]
+ - vs2017 # [win]
vc: # [win]
- 14 # [win]
