Remove unused juwelier development dependency

The gemspec is now hand-maintained as ruby-plsql.gemspec, so the
Juwelier::Tasks block in the Rakefile (guarded by rescue LoadError)
and the gem 'juwelier', '~> 2.0' line in every gemfiles/Gemfile.activerecord-*
variant are dead weight. Drop them so contributors are not misled into
thinking juwelier is still part of the build or release flow.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: yahonda

Rakefile

@@ -10,27 +10,6 @@ end
 
 require "rake"
 
-begin
-  require "juwelier"
-  Juwelier::Tasks.new do |gem|
-    gem.name = "ruby-plsql"
-    gem.summary = "Ruby API for calling Oracle PL/SQL procedures."
-    gem.description = <<-EOS
-  ruby-plsql gem provides simple Ruby API for calling Oracle PL/SQL procedures.
-  It could be used both for accessing Oracle PL/SQL API procedures in legacy applications
-  as well as it could be used to create PL/SQL unit tests using Ruby testing libraries.
-  EOS
-    gem.email = "raimonds.simanovskis@gmail.com"
-    gem.homepage = "http://github.com/rsim/ruby-plsql"
-    gem.license = "MIT".freeze
-    gem.authors = ["Raimonds Simanovskis"]
-    gem.extra_rdoc_files = ["README.md"]
-  end
-  Juwelier::RubygemsDotOrgTasks.new
-rescue LoadError
-  # juwelier not installed
-end
-
 require "rspec/core/rake_task"
 RSpec::Core::RakeTask.new(:spec)
 

gemfiles/Gemfile.activerecord-5.0

@@ -1,7 +1,6 @@
 source 'http://rubygems.org'
 
 group :development do
-  gem 'juwelier', '~> 2.0'
   gem 'rspec_junit_formatter'
 end
 

gemfiles/Gemfile.activerecord-5.1

@@ -1,7 +1,6 @@
 source 'http://rubygems.org'
 
 group :development do
-  gem 'juwelier', '~> 2.0'
   gem 'rspec_junit_formatter'
 end
 

gemfiles/Gemfile.activerecord-5.2

@@ -1,7 +1,6 @@
 source 'http://rubygems.org'
 
 group :development do
-  gem 'juwelier', '~> 2.0'
   gem 'rspec_junit_formatter'
 end
 

gemfiles/Gemfile.activerecord-6.0

@@ -1,7 +1,6 @@
 source 'http://rubygems.org'
 
 group :development do
-  gem 'juwelier', '~> 2.0'
   gem 'rspec_junit_formatter'
 end
 

gemfiles/Gemfile.activerecord-6.1

@@ -1,7 +1,6 @@
 source 'http://rubygems.org'
 
 group :development do
-  gem 'juwelier', '~> 2.0'
   gem 'rspec_junit_formatter'
 end
 

gemfiles/Gemfile.activerecord-7.0

@@ -1,7 +1,6 @@
 source 'http://rubygems.org'
 
 group :development do
-  gem 'juwelier', '~> 2.0'
   gem 'rspec_junit_formatter'
 end
 

gemfiles/Gemfile.activerecord-7.1

@@ -1,7 +1,6 @@
 source 'http://rubygems.org'
 
 group :development do
-  gem 'juwelier', '~> 2.0'
   gem 'rspec_junit_formatter'
 end
 

gemfiles/Gemfile.activerecord-7.2

@@ -1,7 +1,6 @@
 source 'http://rubygems.org'
 
 group :development do
-  gem 'juwelier', '~> 2.0'
   gem 'rspec_junit_formatter'
 end
 

gemfiles/Gemfile.activerecord-8.0

@@ -1,7 +1,6 @@
 source 'http://rubygems.org'
 
 group :development do
-  gem 'juwelier', '~> 2.0'
   gem 'rspec_junit_formatter'
 end