ci: clean Windows conda build

.github/workflows/build.yml

@@ -21,7 +21,7 @@ jobs:
     - uses: goanpeca/setup-miniconda@v1
       with:
         activate-environment: eigenpy
-        environment-file: ci/environment.yml
+        environment-file: .github/workflows/conda/environment.yml
         python-version: 3.7
     - name: Build Eigenpy
       shell: cmd /C CALL {0}
@@ -42,8 +42,6 @@ jobs:
           -DCMAKE_INSTALL_PREFIX=%CONDA_PREFIX%\Library ^
           -DCMAKE_BUILD_TYPE=Release ^
           -DEIGENPY_SITELIB_ROOT=%CONDA_PREFIX% ^
-          -DEIGEN3_FOUND=1 ^
-          -DEIGEN3_INCLUDE_DIRS=%CONDA_PREFIX%\Library\include\eigen3 ^
           -DPYTHON_EXECUTABLE=%CONDA_PREFIX%\python.exe ^
           ..
         cmake --build . --config Release --target install