refactor: trying refactoring Rakefile

Rakefile

@@ -2,14 +2,6 @@
 
 require "decidim/dev/common_rake"
 
-def fix_babel_config(path)
-  Dir.chdir(path) do
-    babel_config = "#{Dir.pwd}/babel.config.json"
-    File.delete(babel_config) if File.exist?(babel_config)
-    FileUtils.cp("#{__dir__}/babel.config.json", Dir.pwd)
-  end
-end
-
 def install_module(path)
   Dir.chdir(path) do
     system("npm i @babel/plugin-proposal-private-property-in-object")
@@ -19,7 +11,6 @@ end
 desc "Generates a dummy app for testing"
 task test_app: "decidim:generate_external_test_app" do
   ENV["RAILS_ENV"] = "test"
-  fix_babel_config("spec/decidim_dummy_app")
   install_module("spec/decidim_dummy_app")
 end