Removed unnecessary Gem dependencies

Signed-off-by: Jim Martens <github@2martens.de>

Gemfile

@@ -4,10 +4,8 @@ gem 'activesupport'
 gem 'mini_racer'
 # gem 'github-pages-health-check'
 gem 'html-proofer', group: :development
-gem 'jekyll', '~> 3.8.4'
+gem 'jekyll', '~> 3.8.5'
 group :jekyll_plugins do
-  gem 'autoprefixer-rails'
-  gem 'bootstrap', '~> 4.3.1'
   gem 'jekyll-avatar'
   gem 'jekyll-coffeescript'
   gem 'jekyll-commonmark-ghpages'
@@ -26,10 +24,7 @@ group :jekyll_plugins do
   gem 'jekyll-sitemap'
   gem 'jekyll-titles-from-headings'
   gem 'jemoji'
-  gem 'sprockets', '~> 4.0.0beta8'
-  gem 'uglifier'
 end
-gem 'jekyll-sass-converter', '~> 1.5.2'
 # themes
 gem 'jekyll-swiss'
 gem 'jekyll-theme-architect'
@@ -55,6 +50,5 @@ gem 'rack', '~> 2.0.6'
 gem 'rouge'
 gem 'rubocop'
 gem 'rubyzip', '~> 1.2.2'
-gem 'sass_paths'
 # gem 'ruby-oembed'
 gem 'terminal-table'

Gemfile.lock

@@ -1,19 +1,6 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actionpack (5.2.2)
-      actionview (= 5.2.2)
-      activesupport (= 5.2.2)
-      rack (~> 2.0)
-      rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.2)
-      activesupport (= 5.2.2)
-      builder (~> 3.1)
-      erubi (~> 1.4)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.3)
     activesupport (5.2.2)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
@@ -22,13 +9,6 @@ GEM
     addressable (2.5.2)
       public_suffix (>= 2.0.2, < 4.0)
     ast (2.4.0)
-    autoprefixer-rails (9.4.9)
-      execjs
-    bootstrap (4.3.1)
-      autoprefixer-rails (>= 9.1.0)
-      popper_js (>= 1.14.3, < 2)
-      sassc-rails (>= 2.0.0)
-    builder (3.2.3)
     coffee-script (2.4.1)
       coffee-script-source
       execjs
@@ -38,11 +18,9 @@ GEM
     commonmarker (0.17.13)
       ruby-enum (~> 0.5)
     concurrent-ruby (1.1.4)
-    crass (1.0.4)
     em-websocket (0.5.1)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
-    erubi (1.8.0)
     ethon (0.12.0)
       ffi (>= 1.3.0)
     eventmachine (1.2.7)
@@ -176,11 +154,7 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
       ruby_dep (~> 1.2)
-    loofah (2.2.3)
-      crass (~> 1.0.2)
-      nokogiri (>= 1.5.9)
     mercenary (0.3.6)
-    method_source (0.9.2)
     mini_portile2 (2.4.0)
     mini_racer (0.2.4)
       libv8 (>= 6.3)
@@ -199,26 +173,11 @@ GEM
       ast (~> 2.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    popper_js (1.14.5)
     powerpack (0.1.2)
     psych (3.1.0)
     public_suffix (3.0.3)
     rack (2.0.6)
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
-    rails-dom-testing (2.0.3)
-      activesupport (>= 4.2.0)
-      nokogiri (>= 1.6)
-    rails-html-sanitizer (1.0.4)
-      loofah (~> 2.2, >= 2.2.2)
-    railties (5.2.2)
-      actionpack (= 5.2.2)
-      activesupport (= 5.2.2)
-      method_source
-      rake (>= 0.8.7)
-      thor (>= 0.19.0, < 2.0)
     rainbow (3.0.0)
-    rake (12.3.2)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)
@@ -243,38 +202,16 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    sass_paths (2.0.0)
-      sass (~> 3.2)
-    sassc (2.0.1)
-      ffi (~> 1.9)
-      rake
-    sassc-rails (2.1.0)
-      railties (>= 4.0.0)
-      sassc (>= 2.0)
-      sprockets (> 3.0)
-      sprockets-rails
-      tilt
     sawyer (0.8.1)
       addressable (>= 2.3.5, < 2.6)
       faraday (~> 0.8, < 1.0)
-    sprockets (4.0.0.beta8)
-      concurrent-ruby (~> 1.0)
-      rack (> 1, < 3)
-    sprockets-rails (3.2.1)
-      actionpack (>= 4.0)
-      activesupport (>= 4.0)
-      sprockets (>= 3.0.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
-    thor (0.20.3)
     thread_safe (0.3.6)
-    tilt (2.0.9)
     typhoeus (1.3.1)
       ethon (>= 0.9.0)
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (4.1.20)
-      execjs (>= 0.3.0, < 3)
     unicode-display_width (1.4.1)
     yell (2.0.7)
 
@@ -283,10 +220,8 @@ PLATFORMS
 
 DEPENDENCIES
   activesupport
-  autoprefixer-rails
-  bootstrap (~> 4.3.1)
   html-proofer
-  jekyll (~> 3.8.4)
+  jekyll (~> 3.8.5)
   jekyll-avatar
   jekyll-coffeescript
   jekyll-commonmark-ghpages
@@ -300,7 +235,6 @@ DEPENDENCIES
   jekyll-redirect-from
   jekyll-relative-links
   jekyll-remote-theme
-  jekyll-sass-converter (~> 1.5.2)
   jekyll-seo-tag
   jekyll-sitemap
   jekyll-swiss
@@ -329,10 +263,7 @@ DEPENDENCIES
   rouge
   rubocop
   rubyzip (~> 1.2.2)
-  sass_paths
-  sprockets (~> 4.0.0beta8)
   terminal-table
-  uglifier
 
 BUNDLED WITH
    1.16.2