Remove unneeded tasks from Rakefile.

Rakefile

@@ -8,21 +8,6 @@ Rake::TestTask.new(:test) do |test|
   test.verbose = true
 end
 
-begin
-  require 'rcov/rcovtask'
-  Rcov::RcovTask.new do |test|
-    test.libs << 'test'
-    test.pattern = 'test/**/*_test.rb'
-    test.verbose = true
-  end
-rescue LoadError
-  task :rcov do
-    abort "RCov is not available. In order to run rcov, you must: sudo gem install spicycode-rcov"
-  end
-end
-
-task :test => :check_dependencies
-
 task :default => :test
 
 require 'rake/rdoctask'