Remove Apache configuration preventing prepaid-cards section from being cached

[Scotchester]

We can't recall why we would have done that, and can't think of a good reason to still be doing it.

Removals

• Apache configuration directive setting the Edge-Control: no-store header for /consumer-tools/prepaid-cards/ and its children

Changes

• Makes comment that preceded that a little more explicit

Checklist

• PR has an informative and human-readable title
• Changes are limited to a single goal (no scope creep)
• Code can be automatically merged (no conflicts)
• Code follows the standards laid out in the CFPB development guidelines
• Passes all existing automated tests
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future todos are captured in comments
• Visually tested in supported browsers and devices (see checklist below 👇)
• Project documentation has been updated
• Reviewers requested with the Reviewers tool ➡️