chore: remove ipfs-unixfs-importer from bundle #92

Job	Run time
js-test-and-release / check	2m 5s
js-test-and-release / test-chrome	49s
js-test-and-release / test-firefox	46s
js-test-and-release / test-chrome-webworker	43s
js-test-and-release / test-node (windows-latest, lts/*)	2m 38s
js-test-and-release / test-node (ubuntu-latest, lts/*)	31s
js-test-and-release / test-electron-main	40s
js-test-and-release / test-node (macos-latest, lts/*)	3m 32s
js-test-and-release / test-firefox-webworker	52s
js-test-and-release / test-webkit (ubuntu-latest, lts/*)	56s
js-test-and-release / test-webkit-webworker (ubuntu-latest, lts/*)	58s
js-test-and-release / test-webkit (macos-latest, lts/*)	2m 5s
js-test-and-release / test-webkit-webworker (macos-latest, lts/*)	2m 3s
js-test-and-release / test-electron-renderer	20s
js-test-and-release / release-check	0s
js-test-and-release / release	0s
	18m 58s

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