remove dead code in yaml component
Merge branch '2.1' into 2.2

* 2.1:
  [FrameworkBundle] Fixes invalid serialized objects in cache
  remove dead code in yaml component
  fixed typo
  RedisProfilerStorage wrong db-number/index-number selected
  [DependencyInjection] added a test for the previous merge (refs #7261)
  Unset loading[$id] in ContainerBuilder on exception
  [Console] fixed StringInput binding
  [Console] added string input test
  Revert "merged branch jfsimon/issue-6749 (PR #7220)"
  fixed CS

Conflicts:
	src/Symfony/Component/Console/Tests/Input/StringInputTest.php
	src/Symfony/Component/HttpKernel/Profiler/RedisProfilerStorage.php