[DependencyInjection] Removed unreachable code
minor #12072 [DependencyInjection] Removed unreachable code (unkind)

This PR was merged into the 2.6-dev branch.

Discussion
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[DependencyInjection] Removed unreachable code

| Q             | A
| ------------- | ---
| Bug fix?      | not really
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

According to undefined $e, this is an unreachable code. As I can see, circular references are handled by parent method.

Commits
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ecedea2 [DependencyInjection] Removed unreachable code