Turn off doxygen generation with cmake flag

Author: tmadlener

.github/workflows/edm4eic.yml

@@ -69,10 +69,10 @@ jobs:
           echo "::endgroup::"
 
           echo "::group::Build EDM4eic"
-          export PATH=$(echo $PATH | tr ':' '\n' | grep -v doxygen | tr '\n' ':')
           cmake -B ${STARTDIR}/edm4eic/build -S ${STARTDIR}/edm4eic \
             -DCMAKE_CXX_FLAGS=" -fdiagnostics-color=always -Werror " \
             -DBUILD_TESTING=ON \
+            -DGENERATE_DOCS=OFF \
             -GNinja
           cmake --build ${STARTDIR}/edm4eic/build
           ctest --test-dir ${STARTDIR}/edm4eic/build -j$(nproc) --output-on-failure