Drop asset cache and precompilation on Travis again

.travis.yml

@@ -14,7 +14,6 @@ sudo: false
 cache:
   bundler: true
   directories:
-    - public/assets
     - app/assets/images
 
 branches:

lib/tasks/tests.rake

@@ -4,7 +4,7 @@ namespace :ci do
     task :other => [ :prepare_db, "tests:generate_fixtures", :spec, "jasmine:ci" ]
 
     desc "Run cucumber"
-    task :cucumber => [ :prepare_db, "assets:precompile", "rake:cucumber" ]
+    task :cucumber => [ :prepare_db, "rake:cucumber" ]
 
     desc "Prepare db"
     task :prepare_db => [ "db:create", "db:test:load"]