Remove v141 toolset references from CI jobs

Since we don't use the v141 toolset anyway just remove it instead of
adding it and excluding it in all cases.

.github/workflows/unittest.yml

@@ -14,7 +14,7 @@ jobs:
  matrix:
  boost_version: ["1.80.0", "1.81.0", "1.82.0", "1.83.0"]
  os: [windows-2019, windows-2022]
- toolset: [v141, v142, v143, ClangCL]
+ toolset: [v142, v143, ClangCL]
  build_type: [Debug, Release]
  standard: [14, 17, 20]
  generator: ["Visual Studio 16 2019", "Visual Studio 17 2022"]
@@ -23,15 +23,9 @@ jobs:
  name_args: [""]
  exclude:
  - { os: windows-2019, toolset: v143 }
- - { os: windows-2022, toolset: v141 }
  - { os: windows-2019, generator: "Visual Studio 17 2022" }
  - { os: windows-2022, generator: "Visual Studio 16 2019" }
  - { toolset: ClangCL, build_type: Release }
- # The following combinations are not available through install-boost
- - { boost_version: "1.80.0", toolset: v141 }
- - { boost_version: "1.81.0", toolset: v141 }
- - { boost_version: "1.82.0", toolset: v141 }
- - { boost_version: "1.83.0", toolset: v141 }
  include:
  - boost_version: "1.83.0"
  os: windows-2022
@@ -68,7 +62,7 @@ jobs:
  # The platform_version passed to boost-install determines the msvc toolset version for which static libs are installed.
  - name: Add boost platform version to environment
  run: |
- declare -A toolset_to_platform_version=( [mingw]="2019" [v141]="2016" [v142]="2019" [v143]="2022" [ClangCL]="2019" )
+ declare -A toolset_to_platform_version=( [mingw]="2019" [v142]="2019" [v143]="2022" [ClangCL]="2019" )
  key=$([[ "${{matrix.generator}}" == "MinGW Makefiles" ]] && echo "mingw" || echo "${{matrix.toolset}}")
  echo BOOST_PLATFORM_VERSION="${toolset_to_platform_version[$key]}" >> $GITHUB_ENV