remove golang dependency for cmake build on windows

BUILDING.md

@@ -56,8 +56,6 @@ To prepare for cmake + Microsoft Visual C++ compiler build
 - Install Visual Studio 2015 or 2017 (Visual C++ compiler will be used).
 - Install [Git](https://git-scm.com/).
 - Install [CMake](https://cmake.org/download/).
-- Install [Active State Perl](https://www.activestate.com/activeperl/) (`choco install activeperl`) - *required by boringssl*
-- Install [Go](https://golang.org/dl/) (`choco install golang`) - *required by boringssl*
 - Install [nasm](https://www.nasm.us/) and add it to `PATH` (`choco install nasm`) - *required by boringssl*
 - (Optional) Install [Ninja](https://ninja-build.org/) (`choco install ninja`)
 

tools/internal_ci/helper_scripts/prepare_build_windows.bat

@@ -35,10 +35,6 @@ python -m pip install google-api-python-client
 powershell -File src\csharp\install_dotnet_sdk.ps1
 set PATH=%LOCALAPPDATA%\Microsoft\dotnet;%PATH%
 
-@rem Newest version of Go is required to be able to build boringssl with cmake
-@rem TODO(jtattermusch): try to eliminate the dependency on Go
-choco install golang -y --version 1.13.1 --limit-output
-
 @rem Install Python 3.8.0
 @rem NOTE(lidiz): Python installer process may live longer than expected, and
 @rem has other side effects. It needs to be installed last to reduce impact.