Remove removal notice for review requests

This was merged before the feature was removed,
so we need to revert the 15.0 notification. We can
add it back after the feature is completely removed
from the codebase.

data/removals/15_0/15-0-rerequest-review.yml

-- name: "Request a new review"  # the name of the feature being removed. Avoid the words `deprecation`, `deprecate`, `removal`, and `remove` in this field because these are implied.
-  announcement_milestone: "15.0"  # The milestone when this feature was deprecated.
-  announcement_date: "2022-05-22"  # The date of the milestone release when this feature was deprecated. This should almost always be the 22nd of a month (YYYY-MM-DD), unless you did an out of band blog post.
-  removal_milestone: "15.0"  # The milestone when this feature is being removed.
-  removal_date: "2022-05-22"  # This should almost always be the 22nd of a month (YYYY-MM-DD), the date of the milestone release when this feature will be removed.
-  breaking_change: false  # Change to true if this removal is a breaking change.
-  reporter: phikai  # GitLab username of the person reporting the removal
-  body: |  # Do not modify this line, instead modify the lines below.
-    The ability to [request a new review](https://docs.gitlab.com/ee/user/project/merge_requests/reviews/#request-a-new-review) has been removed in GitLab 15.0. This feature is replaced with [requesting attention](https://docs.gitlab.com/ee/user/project/merge_requests/#request-attention-to-a-merge-request) to a merge request.
-# The following items are not published on the docs page, but may be used in the future.
-  stage: Create  # (optional - may be required in the future) String value of the stage that the feature was created in. e.g., Growth
-  tiers:  # (optional - may be required in the future) An array of tiers that the feature is available in currently.  e.g., [Free, Silver, Gold, Core, Premium, Ultimate]
-  issue_url:  # (optional) This is a link to the deprecation issue in GitLab
-  documentation_url: https://docs.gitlab.com/ee/user/project/merge_requests/reviews/#request-a-new-review  # (optional) This is a link to the current documentation page
-  image_url:  # (optional) This is a link to a thumbnail image depicting the feature
-  video_url:  # (optional) Use the youtube thumbnail URL with the structure of https://img.youtube.com/vi/UNIQUEID/hqdefault.jpg

doc/update/removals.md

@@ -28,12 +28,6 @@ For removal reviewers (Technical Writers only):
   https://about.gitlab.com/handbook/marketing/blog/release-posts/#update-the-removals-doc
 -->
 
-## 15.0
-
-### Request a new review
-
-The ability to [request a new review](https://docs.gitlab.com/ee/user/project/merge_requests/reviews/#request-a-new-review) has been removed in GitLab 15.0. This feature is replaced with [requesting attention](https://docs.gitlab.com/ee/user/project/merge_requests/#request-attention-to-a-merge-request) to a merge request.
-
 ## 14.9
 
 ### Integrated error tracking disabled by default