Removing summary paragraphs after policies and announcement headings
on people and minister pages

• these summary sentences only appear on people and minister pages so
have removed them from there
• as a result I remove the def from the helper too as it's now unused
• and removed it from the translation files too

https://www.agileplannerapp.com/boards/105200/cards/5558
Merge pull request #1732 from alphagov/remove-policies-and-annoucements-summary-paragraphs-for-people

Removing summary paragraphs after policies and announcement headings