remove yarn from default-trusted-dependencies.txt

[RiskyMH]

What does this PR do?

Yarn has a postinstall script but its not needed when using bun. The script is about corepack stuff and ensuring its not conflicting, however the way it is checking means it should never be affected by bun i -g yarn or bunx yarn. As such bun is just slowing down trying to check for it.

https://app.unpkg.com/yarn@1.22.22/files/preinstall.js

As a sideresult this should make it work on windows, even though the actual fix for it is to make bun shell understand :; (node ./preinstall.js > /dev/null 2>&1 || true)

bunx yarn@latest

  ⚙️  yarn [1/1] error: Failed to run script C:\Users\...\AppData\Local\Temp\bunx-3645674270-yarn@latest\node_modules\yarn\[eval] due to error expected a command or assignment but got: "Redirect"

• Documentation or TypeScript types (it's okay to leave the rest blank in this case)
• Code changes

How did you verify your code works?

[robobun]

^{Updated 4:04 AM PT - Jun 27th, 2025}

❌ @RiskyMH, your commit 28da074 has 1 failures in Build #19375:

• test/js/node/test/parallel/test-net-bytes-stats.js - code 1 on 🍎 14 aarch64

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🧪   To try this PR locally:

bunx bun-pr 20684

That installs a local version of the PR into your bun-20684 executable, so you can run:

bun-20684 --bun