Remove unnecessary comment from finder class

ee/app/finders/security/vulnerability_findings_finder.rb

@@ -13,8 +13,6 @@
 #     report_type: Array<String>
 
 module Security
-  # TODO: check usages and rename `vulnerable` associations to mention the term "finding";
-  # probably, add new changes to https://gitlab.com/gitlab-org/gitlab/merge_requests/17351
   class VulnerabilityFindingsFinder
     attr_accessor :params
     attr_reader :vulnerable