Framework: Remove SCSS entry from CODEOWNERS

[aduth]

Previously: #14062 (comment)

This pull request seeks to remove the *.scss entry from the CODEOWNERS file.

The behavior of CODEOWNERS is such that the last match will take precedence:

# Order is important; the last matching pattern takes the most
# precedence. When someone opens a pull request that only
# modifies JS files, only @js-owner and not the global
# owner(s) will be requested for a review.
*.js    @js-owner

https://help.github.com/en/articles/about-code-owners#codeowners-syntax

The proposed benefit of removing this entry is:

• Avoid overburdening a small set of individuals
• Ensure to notify those who are otherwise marked as code owners for the given file placement

Testing Instructions:

This is a repository metadata file. There is no impact on the application.

[chrisvanpatten]

Go forth and merge!