Clarified some backend code comments

app/presenters/projects/import_export/project_export_presenter.rb

@@ -34,7 +34,6 @@ module Projects
         # We need `.connected_to_user` here otherwise when a group has an
         # invitee, it would make the following query return 0 rows since a NULL
         # user_id would be present in the subquery
-        # See http://stackoverflow.com/questions/129077/not-in-clause-and-null-values
         non_null_user_ids = project.project_members.connected_to_user.select(:user_id)
         GroupMembersFinder.new(project.group).execute.where.not(user_id: non_null_user_ids)
       end

config/sidekiq_queues.yml

@@ -17,9 +17,8 @@
 # 3: high priority
 # 5: _super_ high priority, this should only be used for _very_ important queues
 #
-# As per http://stackoverflow.com/a/21241357/290102 the formula for calculating
-# the likelihood of a job being popped off a queue (given all queues have work
-# to perform) is:
+# The formula for calculating the likelihood of a job being popped off a queue
+# (given all queues have work to perform) is:
 #
 #     chance = (queue weight / total weight of all queues) * 100
 ---

ee/app/finders/security/pipeline_vulnerabilities_finder.rb

@@ -53,7 +53,6 @@ module Security
       # environment.
       # This is easier to address from within the class rather than from tests because this leads to bad class design
       # and exposing too much of its implementation details to the test suite.
-      # See also https://stackoverflow.com/questions/15442298/is-sort-in-ruby-stable.
       Gitlab::Utils.stable_sort_by(findings) { |x| [-x.severity_value, -x.confidence_value] }
     end
 

lib/gitlab/branch_push_merge_commit_analyzer.rb

@@ -114,7 +114,7 @@ module Gitlab
     # If child commit is a direct ancestor, its first parent is also a direct ancestor.
     # We assume direct ancestors matches the trail of the target branch over time,
     # This assumption is correct most of the time, especially for gitlab managed merges,
-    # but there are exception cases which can't be solved (https://stackoverflow.com/a/49754723/474597)
+    # but there are exception cases which can't be solved.
     def mark_all_direct_ancestors(commit)
       loop do
         commit = get_commit(commit.parent_ids.first)

lib/gitlab/ci/templates/dotNET.gitlab-ci.yml

@@ -21,7 +21,7 @@
 #
 # The deploy stage copies the exe and msi from build stage to a network drive
 # You need to have the network drive mapped as Local System user for gitlab-runner service to see it
-# The best way to persist the mapping is via a scheduled task (see: https://stackoverflow.com/a/7867064/1288473),
+# The best way to persist the mapping is via a scheduled task
 # running the following batch command: net use P: \\x.x.x.x\Projects /u:your_user your_pass /persistent:yes
 
 # place project specific paths in variables to make the rest of the script more generic

lib/gitlab/ci/trace/stream.rb

@@ -3,7 +3,6 @@
 module Gitlab
   module Ci
     class Trace
-      # This was inspired from: http://stackoverflow.com/a/10219411/1520132
       class Stream
         BUFFER_SIZE = 4096
         LIMIT_SIZE = 500.kilobytes

lib/gitlab/git.rb

@@ -5,7 +5,6 @@ require_dependency 'gitlab/encoding_helper'
 module Gitlab
   module Git
     # The ID of empty tree.
-    # See http://stackoverflow.com/a/40884093/1856239 and
     # https://github.com/git/git/blob/3ad8b5bf26362ac67c9020bf8c30eee54a84f56d/cache.h#L1011-L1012
     EMPTY_TREE_ID = '4b825dc642cb6eb9a060e54bf8d69288fbee4904'
     BLANK_SHA = ('0' * 40).freeze

lib/support/logrotate/gitlab

 # GitLab logrotate settings
-# based on: http://stackoverflow.com/a/4883967
 
 /home/git/gitlab/log/*.log {
     su git git

lib/tasks/gitlab/sidekiq.rake

@@ -86,9 +86,8 @@ namespace :gitlab do
           # 3: high priority
           # 5: _super_ high priority, this should only be used for _very_ important queues
           #
-          # As per http://stackoverflow.com/a/21241357/290102 the formula for calculating
-          # the likelihood of a job being popped off a queue (given all queues have work
-          # to perform) is:
+          # The formula for calculating the likelihood of a job being popped off a queue
+          # (given all queues have work to perform) is:
           #
           #     chance = (queue weight / total weight of all queues) * 100
         BANNER

spec/support/helpers/bare_repo_operations.rb

@@ -17,7 +17,6 @@ class BareRepoOperations
     commit_id[0]
   end
 
-  # Based on https://stackoverflow.com/a/25556917/1856239
   def commit_file(file, dst_path, branch = 'master')
     head_id = execute(['show', '--format=format:%H', '--no-patch', branch], allow_failure: true)[0] || Gitlab::Git::EMPTY_TREE_ID