Skip coverage of C++ code

We don't have any C++ code, so we can't check
its test coverage.

.github/workflows/build.yml

@@ -28,15 +28,10 @@ jobs:
       run: |
         eval "$(conda shell.bash hook)"
         conda activate python${{ matrix.python-version }}
-        rm -f ${CONDA_PREFIX}/lib/libimp_pmi.so* ${CONDA_PREFIX}/lib/_IMP_pmi.so
-        # Use same C/C++ compiler as conda
-        source ${CONDA_PREFIX}/etc/conda/activate.d/activate-gcc_linux-64.sh
-        source ${CONDA_PREFIX}/etc/conda/activate.d/activate-gxx_linux-64.sh
         mkdir build && cd build
         if test "${{ matrix.python-version }}" = "2.7" ; then PY2=on; else PY2=off; fi
-        cmake .. -DIMP_DIR=${CONDA_PREFIX}/lib/cmake/IMP -DUSE_PYTHON2=${PY2} -DCMAKE_CXX_FLAGS="-fprofile-arcs -ftest-coverage"
+        cmake .. -DIMP_DIR=${CONDA_PREFIX}/lib/cmake/IMP -DUSE_PYTHON2=${PY2}
         make
         ./setup_environment.sh pytest --cov=.. --cov-branch --cov-report=xml -v ../test/test_*.py test/*/*.py
         flake8 ../pyext/src/
-        ${GCC/gcc/gcov} $(find . -name "*.gcno")
     - uses: codecov/codecov-action@v3