Refactor Text component to use Box color prop

[georgewrmarshall]

Description

Currently the Text component is using it's own logic and classNames to decide on the css color. This is creating extra classNames and CSS that isn't necessary as well as complicates tests when change the root component from Box to Text.

The Text component should be refactored to just utilize the Box color prop instead of creating it's own version

Technical Details

• Remove the color prop logic and css from the Text component
• Update Tests

Acceptance Criteria

• Text component uses the Box component color prop
• Checking for a color class on the Text component should just check for the box--color-[color]