Remove unused VariableDeclarationContext value: kBlockElement
Remove unused VariableDeclarationContext value: kBlockElement

R=arv@chromium.org

Review URL: https://codereview.chromium.org/867923004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#26258}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh