Revert "Verify that Qt's MinGW makes no difference for lcov on Windows 2025"

This reverts commit e517237.

Author: pcolby

.github/workflows/build.yaml

@@ -604,11 +604,11 @@ jobs:
           - { toolchain: 'llvm',  arch: x86-64, qt: '6.9.1',  aqtTools: 'tools_llvm_mingw1706' }
           - { toolchain: 'mingw', arch: x86-64, qt: '6.9.1',  aqtTools: 'tools_mingw1310' }
           ## Windows Server 2025-specific cases.
-          # - { toolchain: 'mingw', arch: x86,    qt: '5.9.9',   aqtTools: 'tools_mingw81,qt.tools.win32_mingw810', os: '2025' }
-          # - { toolchain: 'mingw', arch: x86,    qt: '5.10.1',  aqtTools: 'tools_mingw81,qt.tools.win32_mingw810', os: '2025' }
-          # - { toolchain: 'mingw', arch: x86,    qt: '5.11.3',  aqtTools: 'tools_mingw81,qt.tools.win32_mingw810', os: '2025' }
-          # - { toolchain: 'mingw', arch: x86,    qt: '5.12.12', aqtTools: 'tools_mingw81,qt.tools.win32_mingw810', os: '2025' }
-          # - { toolchain: 'mingw', arch: x86,    qt: '5.13.2',  aqtTools: 'tools_mingw81,qt.tools.win32_mingw810', os: '2025' }
+          - { toolchain: 'mingw', arch: x86,    qt: '5.9.9',   aqtTools: 'tools_mingw81,qt.tools.win32_mingw810', os: '2025' }
+          - { toolchain: 'mingw', arch: x86,    qt: '5.10.1',  aqtTools: 'tools_mingw81,qt.tools.win32_mingw810', os: '2025' }
+          - { toolchain: 'mingw', arch: x86,    qt: '5.11.3',  aqtTools: 'tools_mingw81,qt.tools.win32_mingw810', os: '2025' }
+          - { toolchain: 'mingw', arch: x86,    qt: '5.12.12', aqtTools: 'tools_mingw81,qt.tools.win32_mingw810', os: '2025' }
+          - { toolchain: 'mingw', arch: x86,    qt: '5.13.2',  aqtTools: 'tools_mingw81,qt.tools.win32_mingw810', os: '2025' }
 
     steps:
       - name: Configure path