Remove custom_error_message gem

Gemfile

@@ -73,7 +73,6 @@ gem 'acts-as-taggable-on', '~> 8.1'
 gem 'angularjs-file-upload-rails', '~> 2.4.1'
 gem 'bigdecimal', '3.0.2'
 gem 'bootsnap', require: false
-gem 'custom_error_message', github: 'jeremydurham/custom-err-msg'
 gem 'geocoder'
 gem 'gmaps4rails'
 gem 'mimemagic', '> 0.3.5'

Gemfile.lock

@@ -1,9 +1,3 @@
-GIT
-  remote: https://github.com/jeremydurham/custom-err-msg.git
-  revision: 3a8ec9dddc7a5b0aab7c69a6060596de300c68f4
-  specs:
-    custom_error_message (1.1.1)
-
 GIT
   remote: https://github.com/openfoodfoundation/db2fog.git
   revision: 5b63343847452f52aa42f7fc169d6ab3af57cda3
@@ -734,7 +728,6 @@ DEPENDENCIES
   combine_pdf
   compass-rails
   cuprite
-  custom_error_message!
   database_cleaner
   db2fog!
   ddtrace