You're going to bitterly regret that heresy. The ONLY REASON that God could "Cast your SINS into the SEA" in 2021 is that Jesus made a PERFECT SIN OFFERING (unlike the inferior temporary livestock offerings under the Old Covenant), and by FAITH in Jesus' offering, you can be cleansed. Otherwise, your SIN remains on you, and it won't go well for you at the judgement. The OLD Covenant has passed away, and we LIVE by the NEW Covenant in Jesus' BLOOD.Bob, when I repent, God casts my sins into the sea and remembers them no more. Jesus is completely unnecessary.
Since you "CLAIM" that Jesus is "Unnecessary", your SIN remains, and you are still in your SIN.