Remove deprecated class

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        | 

replace deprecated class with correct one
Merge branch '2.6' into 2.7

* 2.6:
  [DependencyInjection] keep some of the reverted perf optim
  Revert "minor #10241 [DependencyInjection] made some perf improvements (fabpot)"
  Remove deprecated class
Merge branch '2.7'

* 2.7:
  [DependencyInjection] keep some of the reverted perf optim
  Revert "minor #10241 [DependencyInjection] made some perf improvements (fabpot)"
  Remove deprecated class