Rimraf npm
build: remove npm on make install
Different versions of npm potentially have different trees. We should be cleaning the version of npm on every install.
This implements the removal naively by calling
rm -rf $PREFIX/lib/node_modules/npm
in the make install
command.
This does not implement similar functions for the windows installer, nor does it implement the removal in the double click installers.
This can be implemented as part of this PR or as part of another.