minor #38460 Remove "version" from composer.json files, use "branch-version" instead (nicolas-grekas)
minor #38460 Remove "version" from composer.json files, use "branch-version" instead (nicolas-grekas)

This PR was merged into the 3.4 branch.

Discussion
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Remove "version" from composer.json files, use "branch-version" instead

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | -
| License       | MIT
| Doc PR        | -

Waiting for confirmation from @Seldaek or @naderman

Commits
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f9ed6940fd Remove "version" from composer.json files, use "branch-version" instead

symfony/Serializer,symfony/serializer