[Validator] Removed unnecessary check as symfony require php >= 5.3.3.
merged branch lyrixx/email-validator-php533 (PR #8712)

This PR was merged into the master branch.

Discussion
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 	[Validator] Removed unnecessary check as symfony requires php >= 5.3.3.

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | I guess
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
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cf31dfb [Validator] Removed unnecessary check as symfony require php >= 5.3.3.