ci: clean file

.github/workflows/build.yml

@@ -31,7 +31,6 @@ jobs:
         call "%programfiles(x86)%\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" amd64
         mkdir build
         pushd build
-        set PKG_CONFIG_PATH=%CONDA_PREFIX%\Library\share\pkgconfig
         cmake ^
           -G "NMake Makefiles" ^
           -DCMAKE_INSTALL_PREFIX=%CONDA_PREFIX%\Library ^
@@ -40,5 +39,4 @@ jobs:
           -DPYTHON_EXECUTABLE=%CONDA_PREFIX%\python.exe ^
           ..
         cmake --build . --config Release --target install
-        dir unittest
         ctest --output-on-failure -C Release -V