Remove unused cp_array_i_sort.F

git-svn-id: svn://svn.code.sf.net/p/cp2k/code/trunk@14011 bac0169d-1eea-4375-b5f6-f89d2ced9994
Replace find_unused_public.py with fix_unused_public.py

git-svn-id: svn://svn.code.sf.net/p/cp2k/code/trunk@14012 bac0169d-1eea-4375-b5f6-f89d2ced9994