api: support the expiry param on all GET requests.

app/controllers/artists_controller.rb

@@ -44,7 +44,6 @@ class ArtistsController < ApplicationController
       end
       format.json do
         render :json => @artists.to_json(:include => [:urls])
-        expires_in params[:expiry].to_i.days if params[:expiry]
       end
     end
   end

app/controllers/pools_controller.rb

@@ -18,12 +18,7 @@ class PoolsController < ApplicationController
 
   def index
     @pools = Pool.includes(:creator).search(search_params).paginate(params[:page], :limit => params[:limit], :search_count => params[:search])
-    respond_with(@pools) do |format|
-      format.json do
-        render json: @pools.to_json
-        expires_in params[:expiry].to_i.days if params[:expiry]
-      end
-    end
+    respond_with(@pools)
   end
 
   def gallery

app/controllers/tags_controller.rb

@@ -21,8 +21,6 @@ class TagsController < ApplicationController
       @tags = Tag.names_matches_with_aliases(params[:search][:name_matches])
     end
 
-    expires_in params[:expiry].to_i.days if params[:expiry]
-
     respond_with(@tags, root: "tags")
   end
 

app/controllers/users_controller.rb

@@ -30,12 +30,7 @@ class UsersController < ApplicationController
       redirect_to user_path(@user)
     else
       @users = User.search(search_params).paginate(params[:page], :limit => params[:limit], :search_count => params[:search])
-      respond_with(@users) do |format|
-        format.json do
-          render json: @users.to_json
-          expires_in params[:expiry].to_i.days if params[:expiry]
-        end
-      end
+      respond_with(@users)
     end
   end
 

app/controllers/wiki_pages_controller.rb

@@ -26,10 +26,6 @@ class WikiPagesController < ApplicationController
           end
         end
       end
-      format.json do
-        render json: @wiki_pages.to_json
-        expires_in params[:expiry].to_i.days if params[:expiry]
-      end
     end
   end