Comment out png_quantizator dependency in Gemfile

debian/patches/0499-disable-png-quantizator.patch

@@ -0,0 +1,11 @@
+--- a/Gemfile
++++ b/Gemfile
+@@ -350,8 +350,6 @@
+ 
+   gem 'timecop', '~> 0.9.1'
+ 
+-  gem 'png_quantizator', '~> 0.2.1', require: false
+-
+   gem 'parallel', '~> 1.19', require: false
+ 
+   gem 'rblineprof', '~> 0.3.6', platform: :mri, require: false

debian/patches/series

@@ -13,6 +13,7 @@
 0485-relax-gitlab-sidekiq-fetcher.patch
 0486-relax-sidekiq.patch
 0488-relax-bullet.patch
+0499-disable-png-quantizator.patch
 0500-set-webpack-root.patch
 0510-remove-dev-dependencies.patch
 0520-add-system-lib-path-for-webpack.patch