Remove fixed Ant version in GitHub actions for Windows

.github/workflows/build_windows.yml

@@ -14,7 +14,6 @@ jobs:
         os: ["windows-latest"]
         python-version: ["3.8", "3.9", "3.10", "3.11"]
     env:
-      ANT: "/c/ProgramData/chocolatey/lib/ant/tools/apache-ant-1.10.13/bin/ant"
       CPPCHECK_HOME: "/c/Program Files/Cppcheck"
       SPOTBUGS_HOME: "${{github.workspace}}/spotbugs-3.1.12"
       PYLINT_ENABLED: 1
@@ -64,6 +63,7 @@ jobs:
         choco install wget
         choco install graphviz
         choco install zip
+        ant -version
       shell: bash
 
     - name: Install specific version of C++ static code analysis tool (cppcheck)
@@ -102,7 +102,6 @@ jobs:
     - name: Run Zserio tests
       # -DZSERIO_ENABLE_WERROR=1 fails for mingw because of false positive warning
       run: |
-        ant -version
         scripts/test.sh all-windows64-mingw cpp-windows64-msvc
       shell: bash
       env:
@@ -115,7 +114,7 @@ jobs:
       shell: bash
 
     - name: Run Zserio API compatibility checks
-      run: scripts/test_compat_api.sh java python cpp-linux64-msvc
+      run: scripts/test_compat_api.sh java python cpp-windows64-msvc
       shell: bash
       env:
         GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}