remove redundant policies helper 'version_sentence'

(refactor only)
remove redundant policies helper 'policy_division_version_sentence'

(refactor only)
change helper name from 'policy_division_version_sentence2' to 'policy_division_version_sentence'
remove unused helper policy_version_sentence

(refactor only)
adjust helper version_author_link for use in both version types

(refactor only)