Updated account, groups relationships routes to post data instead of get

• Updated:
- account, groups relationships routes to post data instead of get

app/controllers/api/v1/groups/relationships_controller.rb

@@ -1,24 +0,0 @@
-# frozen_string_literal: true
-
-class Api::V1::Groups::RelationshipsController < Api::BaseController
-  before_action -> { doorkeeper_authorize! :read, :'read:groups' }
-  before_action :require_user!
-
-  def index
-    groups = Group.where(id: group_ids, is_archived: false).select('id')
-    # .where doesn't guarantee that our results are in the same order
-    # we requested them, so return the "right" order to the requestor.
-    @groups = groups.index_by(&:id).values_at(*group_ids).compact
-    render json: @groups, each_serializer: REST::GroupRelationshipSerializer, relationships: relationships
-  end
-
-  private
-
-  def relationships
-    GroupRelationshipsPresenter.new(@groups, current_user.account_id)
-  end
-
-  def group_ids
-    Array(params[:id]).map(&:to_i)
-  end
-end