Simplify how admin color schemes are enqueued.

Removes a piece of [27111].

fixes #20729.


git-svn-id: https://develop.svn.wordpress.org/trunk@27203 602fd350-edb4-49c9-b593-d223f7449a82
Remove accidental change in [27203]. see #20729.


git-svn-id: https://develop.svn.wordpress.org/trunk@27204 602fd350-edb4-49c9-b593-d223f7449a82