More yarn removal

.github/workflows/tests.yml

@@ -29,9 +29,9 @@ jobs:
 
     - uses: actions/setup-node@v2
       with:
-        cache: yarn
+        cache: npm
 
-    - run: yarn install
+    - run: npm install
 
     - uses: ruby/setup-ruby@v1
       with:

.gitignore

@@ -16,9 +16,6 @@
 /public/packs
 /public/packs-test
 /node_modules
-/yarn-error.log
-yarn-debug.log*
-.yarn-integrity
 
 /app/assets/builds/*
 !/app/assets/builds/.keep

bin/yarn

@@ -1,17 +0,0 @@
-#!/usr/bin/env ruby
-APP_ROOT = File.expand_path('..', __dir__)
-Dir.chdir(APP_ROOT) do
-  yarn = ENV["PATH"].split(File::PATH_SEPARATOR).
-    select { |dir| File.expand_path(dir) != __dir__ }.
-    product(["yarn", "yarn.cmd", "yarn.ps1"]).
-    map { |dir, file| File.expand_path(file, dir) }.
-    find { |file| File.executable?(file) }
-
-  if yarn
-    exec yarn, *ARGV
-  else
-    $stderr.puts "Yarn executable was not detected in the system."
-    $stderr.puts "Download Yarn at https://yarnpkg.com/en/docs/install"
-    exit 1
-  end
-end