remove rcov from Gemfile (we never used it); this makes rbx happy. reverted back to using rbx on travis

.travis.yml

@@ -7,7 +7,7 @@ rvm:
   - 1.8.7
   - ree
   - 1.9.2
-  - rbx-2.0.0pre
+  - rbx
 
 env:
   - DB=postgres

Gemfile

@@ -120,7 +120,6 @@ group :test do
   gem 'fixture_builder', '0.2.2'
   gem 'fuubar'
   gem 'mongrel', :require => false, :platforms => :ruby_18
-  gem 'rcov', :require => false
 	gem 'rspec', '>= 2.0.0'
   gem 'rspec-core', '2.6.0'
   gem 'rspec-instafail', '>= 0.1.7', :require => false

Gemfile.lock

@@ -362,7 +362,6 @@ GEM
     rake (0.9.2)
     rash (0.3.0)
       hashie (~> 1.0.0)
-    rcov (0.9.10)
     rdoc (3.9.4)
     redis (2.2.2)
     redis-namespace (0.8.0)
@@ -519,7 +518,6 @@ DEPENDENCIES
   omniauth (= 0.2.6)
   rails (= 3.0.10)
   rails-i18n
-  rcov
   redcarpet!
   resque (= 1.10.0)
   resque-ensure-connected