Remove qz gem dependency

Gemfile

@@ -125,8 +125,6 @@ gem 'jquery-rails', '4.4.0'
 gem 'jquery-ui-rails', '~> 4.2'
 gem "select2-rails", github: "openfoodfoundation/select2-rails", branch: "v349_with_thor_v1"
 
-gem 'ofn-qz', github: 'openfoodfoundation/ofn-qz', branch: 'ofn-rails-4'
-
 gem 'good_migrations'
 
 gem 'flipper'

Gemfile.lock

@@ -8,13 +8,6 @@ GIT
       fog-core (~> 1.0)
       rails (>= 3.2.0, < 7.0)
 
-GIT
-  remote: https://github.com/openfoodfoundation/ofn-qz.git
-  revision: 467f6ea1c44529c7c91cac4c8211bbd863588c0b
-  branch: ofn-rails-4
-  specs:
-    ofn-qz (0.1.0)
-
 GIT
   remote: https://github.com/openfoodfoundation/select2-rails.git
   revision: fc240e85fbdf1878ff3c39d972c0cd9a312f5ed4
@@ -837,7 +830,6 @@ DEPENDENCIES
   mini_racer
   monetize (~> 1.11)
   oauth2 (~> 1.4.7)
-  ofn-qz!
   omniauth-rails_csrf_protection
   omniauth_openid_connect
   openid_connect (~> 1.3)

config/application.rb

@@ -219,7 +219,6 @@ module Openfoodnetwork
     config.assets.precompile += ['web/all.js']
     config.assets.precompile += ['darkswarm/all.js']
     config.assets.precompile += ['shared/*']
-    config.assets.precompile += ['qz/*']
     config.assets.precompile += ['*.jpg', '*.jpeg', '*.png', '*.gif' '*.svg']
 
     # Apply framework defaults. New recommended defaults are successively added with each Rails version and