Remove therubyracer

Gemfile

@@ -42,7 +42,6 @@ gem 'spring', :group => :development
 group :production do
   gem 'rails_12factor'
   gem 'mysql2'
-  gem 'therubyracer'
   gem 'newrelic_rpm'
   gem 'dalli'
 end

Gemfile.lock

@@ -115,7 +115,6 @@ GEM
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
-    libv8 (3.16.14.19-x86_64-linux)
     loofah (2.16.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
@@ -185,7 +184,6 @@ GEM
     rb-readline (0.5.5)
     rdoc (6.4.0)
       psych (>= 4.0.0)
-    ref (2.0.0)
     regexp_parser (2.3.1)
     responders (3.0.1)
       actionpack (>= 5.0)
@@ -222,9 +220,6 @@ GEM
       sprockets (>= 3.0.0)
     sqlite3 (1.4.2)
     stringio (3.0.1)
-    therubyracer (0.12.3)
-      libv8 (~> 3.16.14.15)
-      ref
     thor (1.2.1)
     tilt (2.0.10)
     turbolinks (5.2.1)
@@ -274,13 +269,12 @@ DEPENDENCIES
   sdoc
   spring
   sqlite3
-  therubyracer
   turbolinks
   tzinfo-data
   uglifier
 
 RUBY VERSION
-   ruby 3.0.0p0
+   ruby 3.0.4p208
 
 BUNDLED WITH
    2.2.30