Removed the regenerate task.

task/generate.rake

@@ -1,5 +1,2 @@
 desc 'Generates auto-generated files'
 task :generate => [:lexer, :parser]
-
-desc 'Regenerates auto-generated files'
-task :regenerate => [:clean, :generate]

task/test.rake

@@ -1,4 +1,4 @@
 desc 'Runs the tests'
-task :test => [:regenerate] do
+task :test => [:generate] do
   sh 'rspec spec'
 end