Remove silly assignment in views_ui_preprocess_views_view()

This issue has novice tasks. If you are an experienced core developer and have multiple commit mentions, please review novices' work on these tasks rather than doing them yourself. Feedback from experienced contributors is valued.

Problem/Motivation

In views_ui_preprocess_views_view() there is the following line of code:

        $variables[$section] = $variables[$section];

Proposed resolution

Remove this line.

Remaining tasks

• Write patch (novice)
• Review patch to check it fixes the issue, the change is properly documented and for coding standards. Provide test evidence (novice)
• Keep issue summary up to date (novice)

User interface changes

API changes