fix: exclude transform without responsive variants

[tianenpang]

Description

Exclude transform without responsiveVariants config to avoid warnings in the terminal.

Additional context

• Updated the regular expression for extend.

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What is the purpose of this pull request?

• [x] Bug fix
• [ ] New Feature
• [ ] Documentation update
• [ ] Other

Before submitting the PR, please make sure you do the following

• [x] Read the Contributing Guidelines.
• [x] Follow the Style Guide.
• [x] Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• [x] Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).

[sushanyadav]

Thank you @tianenpang ❤️