removing unused rake tasks

Gemfile

-source :rubygems
-
-gem "activerecord", :path => ENV["RAILS_SOURCE"] || 'vendor/rails'
-gem "diff-lcs"
-gem "mysql"
-gem "pg"
-gem "rake"
-gem "rspec"
-gem "sqlite3-ruby"

Rakefile

@@ -6,27 +6,13 @@ rescue LoadError
   desc "Run specs"
   task(:spec) { $stderr.puts '`gem install rspec` to run specs' }
 else
-  namespace :spec do
-    %w[mysql sqlite3 postgresql oracle].each do |adapter|
-      task "set_env_for_#{adapter}" do
-        ENV['ADAPTER'] = adapter
-      end
-
-      Spec::Rake::SpecTask.new(adapter) do |t|
+  Spec::Rake::SpecTask.new do |t|
     t.spec_opts = ['--options', "\"#{File.dirname(__FILE__)}/spec/spec.opts\""]
-        t.libs << "#{File.dirname(__FILE__)}/spec"
+    t.libs << "spec"
     t.warning = true
     t.spec_files = FileList['spec/**/*_spec.rb']
   end
 
-      desc "Run specs with the #{adapter} database adapter"
-      task adapter => "set_env_for_#{adapter}"
-    end
-  end
-
-  desc "Run specs with mysql and sqlite3 database adapters (default)"
-  task :spec => ["spec:sqlite3", "spec:mysql", "spec:postgresql"]
-
   desc "Default task is to run specs"
   task :default => :spec
 end