Remove Donation Compaign and Address Warnings

[raclim]

Changes:

• Adds a showDonationCampaign variable set to false to remove visibility of donation campaign, which may be reused in the future.
• Addresses warnings in client/utils/rename-variable.js and client/index.jsx

I have verified that this pull request:

• has no linting errors (npm run lint)
• has no test errors (npm run test)
• is from a uniquely-named feature branch and is up to date with the develop branch.
• is descriptively named and links to an issue number, i.e. Fixes #123
• meets the standards outlined in the accessibility guidelines

[release-com]

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