Remove restriction on number of processes for Emscripten static library build on Linux/MacOS Github runners

Author: mcbarton

.github/workflows/emscripten.yml

@@ -705,11 +705,7 @@ jobs:
                 ../
         fi
         os="${{ matrix.os }}"
-        if [[ "${os}" != macos* ]] ; then
-          EMCC_CORES=1 emmake make -j 1 check-cppinterop
-        else
-          EMCC_CORES=2 emmake make -j 2 check-cppinterop
-        fi
+        emmake make -j ${{ env.ncpus }} check-cppinterop
         cd ./unittests/CppInterOp/
         # Explaination of options for emrun
         # --browser (name of browser on path)