--- a/Rakefile
+++ b/Rakefile
@@ -1,7 +1,6 @@
 #!/usr/bin/env rake
 # frozen_string_literal: true
 
-require "bundler/gem_tasks"
 require "rake/testtask"
 require "fileutils"
 require "tmpdir"
@@ -43,10 +42,6 @@
   end
 end
 
-require "rubocop/rake_task"
-
-RuboCop::RakeTask.new
-
 desc "Pretty format C code"
 task :format do
   puts %x(astyle --indent=spaces=2 --style=1tbs --keep-one-line-blocks \
@@ -58,8 +53,3 @@
   $LOAD_PATH.unshift("lib")
   load "script/benchmark.rb"
 end
-
-GEMSPEC = Bundler.load_gemspec("mathematical.gemspec")
-gem_path = Gem::PackageTask.new(GEMSPEC).define
-desc "Package the ruby gem"
-task "package" => [gem_path]