Fix linting cops

app/controllers/event_attachments_controller.rb

@@ -52,8 +52,8 @@ class EventAttachmentsController < ApplicationController
 
     if !organizer_or_admin?
       begin
-        event = current_user.events.find(params[:proposal_id])
-      rescue => e
+        current_user.events.find(params[:proposal_id])
+      rescue
         # They certainly aren't allowed to attach a file to someone else's proposal
         raise ActionController::RoutingError.new('Invalid proposal')
       end