Remove custom deny_access handlers

Since these pages are not accessed by normal users, except for url fiddling, it's fine to respond with a generic access denied.

app/controllers/diary_entries_controller.rb

@@ -216,22 +216,6 @@ class DiaryEntriesController < ApplicationController
 
   private
 
-  # This is required because, being a default-deny system, cancancan
-  # _cannot_ tell you the reason you were denied access; and so
-  # the "nice" feedback presenting next steps can't be gleaned from
-  # the exception
-  ##
-  # for the hide actions, require that the user is a administrator, or fill out
-  # a helpful error message and return them to the user page.
-  def deny_access(exception)
-    if current_user && exception.action.in?([:hide, :hidecomment])
-      flash[:error] = t("users.filter.not_an_administrator")
-      redirect_to :action => "show"
-    else
-      super
-    end
-  end
-
   ##
   # return permitted diary entry parameters
   def entry_params

app/controllers/issue_comments_controller.rb

@@ -22,15 +22,6 @@ class IssueCommentsController < ApplicationController
     params.require(:issue_comment).permit(:body)
   end
 
-  def deny_access(_exception)
-    if current_user
-      flash[:error] = t("application.require_moderator_or_admin.not_a_moderator_or_admin")
-      redirect_to root_path
-    else
-      super
-    end
-  end
-
   # This sort of assumes there are only two roles
   def reassign_issue(issue)
     role = (Issue::ASSIGNED_ROLES - [issue.assigned_role]).first

app/controllers/issues_controller.rb

@@ -82,13 +82,4 @@ class IssuesController < ApplicationController
   def find_issue
     @issue = Issue.find(params[:id])
   end
-
-  def deny_access(_exception)
-    if current_user
-      flash[:error] = t("application.require_moderator_or_admin.not_a_moderator_or_admin")
-      redirect_to root_path
-    else
-      super
-    end
-  end
 end