refactor(gemfile): updated gemfile structure

documentation/Gemfile

 source "https://rubygems.org"
-# Hello! This is where you manage which Jekyll version is used to run.
-# When you want to use a different version, change it below, save the
-# file and run `bundle install`. Run Jekyll with `bundle exec`, like so:
-#
-#     bundle exec jekyll serve
-#
-# This will help ensure the proper Jekyll version is running.
-# Happy Jekylling!
+
 gem "jekyll", "~> 4.2.0"
-# This is the default theme for new Jekyll sites. You may change this to anything you like.
-gem "minima", "~> 2.5"
-# If you want to use GitHub Pages, remove the "gem "jekyll"" above and
-# uncomment the line below. To upgrade, run `bundle update github-pages`.
-# gem "github-pages", group: :jekyll_plugins
-# If you have any plugins, put them here!
+gem "webrick", "~> 1.7"
+
 group :jekyll_plugins do
   gem "jekyll-feed", "~> 0.12"
 end
 
-# Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
-# and associated library.
 platforms :mingw, :x64_mingw, :mswin, :jruby do
   gem "tzinfo", "~> 1.2"
   gem "tzinfo-data"
 end
 
-# Performance-booster for watching directories on Windows
 gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
 
 # Documentation theme
 gem "just-the-docs", "~> 0.3.3"
-gem "webrick", "~> 1.7"

documentation/Gemfile.lock

@@ -50,10 +50,6 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
-    minima (2.5.1)
-      jekyll (>= 3.5, < 5.0)
-      jekyll-feed (~> 0.9)
-      jekyll-seo-tag (~> 2.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (4.0.6)
@@ -78,7 +74,6 @@ DEPENDENCIES
   jekyll (~> 4.2.0)
   jekyll-feed (~> 0.12)
   just-the-docs (~> 0.3.3)
-  minima (~> 2.5)
   tzinfo (~> 1.2)
   tzinfo-data
   wdm (~> 0.1.1)