chore(needless_if): rename to needless_ifs

[ada4a]

Lint names should be in plural.

changelog: [needless_if]: rename to needless_ifs

[rustbot]

r? @Alexendoo

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They will have a look at your PR within the next two weeks and either review your PR or reassign to another reviewer.

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[ada4a]

@rustbot blocked on #15960

[samueltardieu]

@rustbot review as #15960 is merged

[rustbot]

This PR was rebased onto a different master commit. Here's a range-diff highlighting what actually changed.

Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers.