zap now-unneeded central Perl install of Alien::proj

Author: mohawk2

github-actions/install-dep-pdl-dep/action.yml

@@ -22,7 +22,6 @@ runs:
         if ${{ toJSON( runner.os == 'Linux' || runner.os == 'macOS' ) }}; then
           echo "::group::Install extra optional main PDL deps (via cpanm)"
           cpanm -n Term::ReadLine::Gnu Inline::C || cat ~/.cpanm/build.log
-          cpanm -n --reinstall Alien::proj || cat ~/.cpanm/build.log # in case has old path
           echo "::endgroup::"
         fi
 #    - name: Install OpenGL PDL deps