Old versions of mocha break after https://github.com/nodejs/node/pull/34637.
This was a bug in mocha, but since this is a widely used module
we can expect ecosystem breakage until modules are updated to
the latest version of mocha. Drop the conflicting `-u` alias --
we can potentially bring it back once modules have been updated.
PR-URL: https://github.com/nodejs/node/pull/34935
Refs: https://github.com/mochajs/mocha/issues/4417
Refs: https://github.com/nodejs/node/pull/34637
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Jan Krems <jan.krems@gmail.com>
Reviewed-By: Beth Griggs <Bethany.Griggs@uk.ibm.com>
Reviewed-By: Myles Borins <myles.borins@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>