[Config] Remove member_comment_time_threshold

This was only stubbed in tests and not used anywhere else

config/danbooru_default_config.rb

@@ -373,10 +373,6 @@ fart'
       2000
     end
 
-    def member_comment_time_threshold
-      1.week.ago
-    end
-
     # Permanently redirect all HTTP requests to HTTPS.
     #
     # https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security

test/functional/comment_votes_controller_test.rb

@@ -5,7 +5,6 @@ class CommentVotesControllerTest < ActionDispatch::IntegrationTest
     setup do
       CurrentUser.user = @user = create(:user)
       CurrentUser.ip_addr = "127.0.0.1"
-      Danbooru.config.stubs(:member_comment_time_threshold).returns(1.week.from_now)
       @comment = create(:comment)
     end
 

test/functional/comments_controller_test.rb

@@ -7,7 +7,6 @@ class CommentsControllerTest < ActionDispatch::IntegrationTest
       @user = FactoryBot.create(:member_user)
       CurrentUser.user = @user
       CurrentUser.ip_addr = "127.0.0.1"
-      Danbooru.config.stubs(:member_comment_time_threshold).returns(1.week.from_now)
 
       @post = FactoryBot.create(:post)
       @comment = FactoryBot.create(:comment, :post => @post)

test/functional/moderator/dashboards_controller_test.rb

@@ -8,7 +8,6 @@ module Moderator
           @user = create(:privileged_user)
         end
         @admin = create(:admin_user)
-        Danbooru.config.stubs(:member_comment_time_threshold).returns(1.week.from_now)
       end
 
       context "show action" do

test/unit/comment_test.rb

@@ -17,7 +17,6 @@ class CommentTest < ActiveSupport::TestCase
       setup do
         @post = FactoryBot.create(:post)
         Danbooru.config.stubs(:member_comment_limit).returns(100)
-        Danbooru.config.stubs(:member_comment_time_threshold).returns(1.week.from_now)
       end
 
       context "added in an edit" do
@@ -85,7 +84,6 @@ class CommentTest < ActiveSupport::TestCase
     context "created by a limited user" do
       setup do
         Danbooru.config.stubs(:member_comment_limit).returns(5)
-        Danbooru.config.stubs(:member_comment_time_threshold).returns(1.week.ago)
       end
 
       should "fail creation" do
@@ -98,7 +96,6 @@ class CommentTest < ActiveSupport::TestCase
     context "created by an unlimited user" do
       setup do
         Danbooru.config.stubs(:member_comment_limit).returns(100)
-        Danbooru.config.stubs(:member_comment_time_threshold).returns(1.week.from_now)
       end
 
       context "that is then deleted" do

test/unit/moderator/ip_addr_search_test.rb

@@ -7,7 +7,6 @@ module Moderator
         @user = FactoryBot.create(:user)
         CurrentUser.user = @user
         CurrentUser.ip_addr = "127.0.0.1"
-        Danbooru.config.stubs(:member_comment_time_threshold).returns(1.week.from_now)
         @comment = FactoryBot.create(:comment)
         PoolArchive.stubs(:enabled?).returns(false)
         PostArchive.stubs(:enabled?).returns(false)

test/unit/user_test.rb

@@ -67,7 +67,6 @@ class UserTest < ActiveSupport::TestCase
     end
 
     should "limit comment votes" do
-      Danbooru.config.stubs(:member_comment_time_threshold).returns(1.week.from_now)
       Danbooru.config.stubs(:member_comment_limit).returns(10)
       assert_equal(@user.can_comment_vote_with_reason?, true)
       10.times do