Remove dislike ad button

[tmancey]

Summary of Changes

This pull request fixes #8211

Submitter Checklist:

• Unit Tests are updated to cover new or changed functionality
• User-facing strings use NSLocalizableString()
• New or updated UI has been tested across:
  • Light & dark mode
  • Different size classes (iPhone, landscape, iPad)
  • Different dynamic type sizes

Test Plan:

Confirm user cannot dislike a notification ad by swiping

Screenshots:

Reviewer Checklist:

• Issues include necessary QA labels:
  • QA/(Yes|No)
  • bug / enhancement
• Necessary security reviews have taken place.
• Adequate unit test coverage exists to prevent regressions.
• Adequate test plan exists for QA to validate (if applicable).
• Issue and pull request is assigned to a milestone (should happen at merge time).

[kylehickinson]

If this is going to be removed, we should also remove all the logic around the dislike button (RewardsNotification.Action.disliked for instance, the swipe gesture on the ads, etc.)

[kylehickinson]

Closing as I will be taking this over