Remove unused package tasks

We are using `all:build` now.

actionmailer/Rakefile

 require 'rake/testtask'
-require 'rubygems/package_task'
 
 desc "Default Task"
 task default: [ :test ]
@@ -20,9 +19,3 @@ namespace :test do
     end or raise "Failures"
   end
 end
-
-spec = eval(File.read('actionmailer.gemspec'))
-
-Gem::PackageTask.new(spec) do |p|
-  p.gem_spec = spec
-end

actionpack/Rakefile

 require 'rake/testtask'
-require 'rubygems/package_task'
 
 test_files = Dir.glob('test/**/*_test.rb')
 
@@ -24,12 +23,6 @@ namespace :test do
   end
 end
 
-spec = eval(File.read('actionpack.gemspec'))
-
-Gem::PackageTask.new(spec) do |p|
-  p.gem_spec = spec
-end
-
 task :lines do
   load File.expand_path('..', File.dirname(__FILE__)) + '/tools/line_statistics'
   files = FileList["lib/**/*.rb"]

actionview/Rakefile

 require 'rake/testtask'
-require 'rubygems/package_task'
 
 desc "Default Task"
 task :default => :test
@@ -45,12 +44,6 @@ namespace :test do
   end
 end
 
-spec = eval(File.read('actionview.gemspec'))
-
-Gem::PackageTask.new(spec) do |p|
-  p.gem_spec = spec
-end
-
 task :lines do
   load File.expand_path('..', File.dirname(__FILE__)) + '/tools/line_statistics'
   files = FileList["lib/**/*.rb"]

activejob/Rakefile

 require 'rake/testtask'
-require 'rubygems/package_task'
 
 ACTIVEJOB_ADAPTERS = %w(inline delayed_job qu que queue_classic resque sidekiq sneakers sucker_punch backburner test)
 ACTIVEJOB_ADAPTERS -= %w(queue_classic) if defined?(JRUBY_VERSION)
@@ -74,10 +73,3 @@ def run_without_aborting(tasks)
 
   abort "Errors running #{errors.join(', ')}" if errors.any?
 end
-
-
-spec = eval(File.read('activejob.gemspec'))
-
-Gem::PackageTask.new(spec) do |p|
-  p.gem_spec = spec
-end

activemodel/Rakefile

-dir = File.dirname(__FILE__)
-
 require 'rake/testtask'
 
+dir = File.dirname(__FILE__)
+
 task :default => :test
 
 Rake::TestTask.new do |t|
@@ -19,11 +19,3 @@ namespace :test do
     end or raise "Failures"
   end
 end
-
-require 'rubygems/package_task'
-
-spec = eval(File.read("#{dir}/activemodel.gemspec"))
-
-Gem::PackageTask.new(spec) do |p|
-  p.gem_spec = spec
-end

activerecord/Rakefile

 require 'rake/testtask'
-require 'rubygems/package_task'
 
 require File.expand_path(File.dirname(__FILE__)) + "/test/config"
 require File.expand_path(File.dirname(__FILE__)) + "/test/support/config"
@@ -151,9 +150,3 @@ task :lines do
   files = FileList["lib/active_record/**/*.rb"]
   CodeTools::LineStatistics.new(files).print_loc
 end
-
-spec = eval(File.read('activerecord.gemspec'))
-
-Gem::PackageTask.new(spec) do |p|
-  p.gem_spec = spec
-end

activesupport/Rakefile

 require 'rake/testtask'
-require 'rubygems/package_task'
 
 task :default => :test
 Rake::TestTask.new do |t|
@@ -17,9 +16,3 @@ namespace :test do
     end or raise "Failures"
   end
 end
-
-spec = eval(File.read('activesupport.gemspec'))
-
-Gem::PackageTask.new(spec) do |p|
-  p.gem_spec = spec
-end

railties/Rakefile

 require 'rake/testtask'
-require 'rubygems/package_task'
 
 task :default => :test
 
@@ -31,11 +30,3 @@ Rake::TestTask.new('test:regular') do |t|
   t.verbose = true
   t.ruby_opts = ["--dev"] if defined?(JRUBY_VERSION)
 end
-
-# Generate GEM ----------------------------------------------------------------------------
-
-spec = eval(File.read('railties.gemspec'))
-
-Gem::PackageTask.new(spec) do |pkg|
-  pkg.gem_spec = spec
-end