build: fix vcbuild merge issues

configure was getting called twice.
We also erroneously introduced support for VS2010,
and were picking 2010 before other versions.

PR-URL: https://github.com/nodejs/io.js/pull/2131
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Johan Bergström <bugs@bergstroem.nu>

vcbuild.bat

@@ -87,18 +87,6 @@ if "%i18n_arg%"=="intl-none" set i18n_arg=--with-intl=none
 call :getnodeversion || exit /b 1
 
 @rem Set environment for msbuild
-:project-gen
-@rem Skip project generation if requested.
-if defined noprojgen goto msbuild
-
-@rem Generate the VS project.
-SETLOCAL
-  if defined VS100COMNTOOLS call "%VS100COMNTOOLS%\VCVarsQueryRegistry.bat"
-  python configure %download_arg% %i18n_arg% %debug_arg% %snapshot_arg% %noetw_arg% %noperfctr_arg% --dest-cpu=%target_arch% --tag=%TAG%
-  if errorlevel 1 goto create-msvs-files-failed
-  if not exist node.sln goto create-msvs-files-failed
-  echo Project files generated.
-ENDLOCAL
 
 @rem Look for Visual Studio 2015
 if not defined VS140COMNTOOLS goto vc-set-2013