It does not matter if it is an employer provided option, but please do not confuse a Roth IRA with a Roth 401(k). They are different and have different rules.
We overcontributed to Roth IRAs and the way we fixed it was to do nothing. We ended up paying a 6% excise tax on the over contribution and then contributed less the next year.
The 6% excise tax was cheaper than anything else considering stocks went up so much.
The "contributed less the next year" is to ensure that we don't keep paying an annual 6% excise tax.
See, e.g., Bogleheads • View topic - Roth excess contrib, pay excise or recharacterize?
and Form 5329.