qt: rebuild without brotli linkage

[carlocab]

qt picked up (opportunistic) linkage with brotli in #74794.

See #75915.

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• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing brew install <formula>)?

[BrewTestBot]

@carlocab has triggered a merge.