minor #2874 Remove runtime deprecation that prevent smooth update (nicolas-grekas)
minor #2874 Remove runtime deprecation that prevent smooth update (nicolas-grekas)

This PR was merged into the 2.x branch.

Discussion
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Remove runtime deprecation that prevent smooth update

This deprecation is already triggered when a class that implements `InitRuntimeInterface` is loaded.
This runtime deprecation prevents creating a continuous upgrade path.

Commits
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8f9fe276 Remove runtime deprecation that prevent smooth update

twigphp/Twig,twigphp/Twig,twigphp/Twig