fix 'should import car with roots but no blocks' test

[SgtPooki]

see #83 (comment)

from @lidel

This is an important smoke-test we should not skip and fix sooner than later (i vaguely remember Filecoin genesis blocks were "special snowflakes" that forced IPLD team to course-correct some specs).

This test is re-enabled, but has part of it temporarily commented out.

js-kubo-rpc-client/test/interface-tests/src/dag/import.js

Lines 158 to 161 in 2819080

	// TODO: https://github.com/ipfs/js-kubo-rpc-client/issues/94 - This is failing. The error message is empty, but it should not be.
	// expect(result[1].root.pinErrorMsg).to.be.a('string')
	// expect(result[1].root.pinErrorMsg).to.not.be.empty('result[1].root.pinErrorMsg should not be empty')
	// expect(result[0].root.pinErrorMsg).to.contain('ipld: could not find')

[tinytb]

We should consider removing the pinning tests from the RPC client. Tests should validate that the daemon receives the correct params; Kubo should ensure that it does the right thing.