Removed undefined mixins

[njtan142]

these mixins are variants, which causes errors as they are simply undefined yet

[vercel[bot]]

@njtan142 is attempting to deploy a commit to the Solana Labs Team on Vercel.

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[ngundotra]

Hey @njtan142 you're getting these errors because instead of pnpm you are using yarn

[njtan142]

Thank you for the clarification!