Remove windows-build installation step

Based off atom/github@9207c7b

Author: icecream17

.github/workflows/ci.yml

@@ -31,12 +31,6 @@ jobs:
         with:
           channel: ${{ matrix.atom_channel }}
 
-      - name: Install Visual Studio 2015 on Windows
-        if: ${{ contains(matrix.os, 'windows') }}
-        run: |
-          choco install visualcpp-build-tools --version=14.0.25420.1 --ignore-dependencies -y --params "'/IncludeRequired'"
-          echo ::set-env name=VCTargetsPath::'C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\v140'
-
       - name: Install dependencies
         run: apm install